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Danindub
Feb 18, 2012, 03:34 AM
Question to those who already installed it :)

Is it stable enough for day-to-day home use? I would love to give it a try, but worried about kernel panics and excessive crashes.

I know it's a dev prev so not expecting too much, but looking forward to opinions :)

Thanks in advance.



hellomoto4
Feb 18, 2012, 04:05 AM
I just have it installed on a second partition on my HDD at the moment, and it's damn stable for DP1, albeit a few little bugs and incompatible apps. I wouldn't recommend taking the leap to a primary install just yet, in case something goes horribly wrong with DP2 or some other issue. However, at this stage, it is surprisingly stable.

adztaylor
Feb 18, 2012, 04:07 AM
It is surprisingly stable. I have it installed on an external hard drive and booting from USB. Not going for the primary install yet though.

Sound214
Feb 18, 2012, 06:31 AM
I find it quite stable, actually. However, iCloud is broken for me, says I can't log in. AirPlay (sound output) doesn't work either, it doesn't even show me the option for it.

The only reason I don't use it on a day-to-day basis is that the DisplayLink driver doesn't work, and of course iCloud, as mentioned above.

Joe HS
Feb 18, 2012, 06:58 AM
Minor graphical bugs here and there, otherwise performance seems better than Lion. No slowdowns or crashes at all. Pleasntly surprised :)

maflynn
Feb 18, 2012, 07:18 AM
Its very stable but it may have a date expiration where it will stop working unless you install a newer build and those newer builds may not have the stability this one has.

Takuro
Feb 18, 2012, 07:31 AM
No kernel panics so far. The Finder and most of the operating system is stable, but I have ran into a few minor problems, like System Preferences crashing in the Desktop and Screensaver pane due to changes that were made to screensaver previewing. There are some rough edges, but overall it works pretty well. You might want to wait until somebody compiles a list of compatible 3rd party apps before taking the plunge, though, just incase you rely on anything that might not work in 10.8.

pmz
Feb 18, 2012, 08:07 AM
Some significant rough edges and graphical glitches, but like everyone else has said, Surprisingly stable for a beta 1 release.

Probably better than Lion DP 1

Fortunately, I think being that its February and the public launch of this (presumably) around August, we'll be seeing updates every 4 - 8 weeks.

Krazy Bill
Feb 18, 2012, 10:15 AM
For all the core functions I would expect it to have the stability of Lion. I'm sure at the core of ML there's at the very least 10.7.3 code. Perhaps even some 10.7.4.

V1D30 GUY
Feb 18, 2012, 11:25 AM
It's very stable for me. On day 3.

frunkis54
Feb 18, 2012, 11:42 AM
I installed it on my MBA works fine as primary on that. I am going to wait to install on my imac.

Yamcha
Feb 18, 2012, 12:09 PM
It's surprisingly stable, In fact I use it as my primary OS, and haven't experienced a single crash yet.. All the applications and games I have are still functioning..

GermanyChris
Feb 18, 2012, 12:59 PM
It seems to be what Lion should have been, lean and stable like Snow Leopard. I'm quite impressed and ready to put lion behind me..

KPOM
Feb 18, 2012, 03:30 PM
Things like Parallels, etc. need to get fixed (and hopefully they don't use it as an excuse to sell another $49 "update") but it sounds like 10.8 is shaping up to be a good update.

87racer
Feb 18, 2012, 05:35 PM
Things like Parallels, etc. need to get fixed (and hopefully they don't use it as an excuse to sell another $49 "update") but it sounds like 10.8 is shaping up to be a good update.

Check out this link (http://bit.ly/ymaDT0) for getting Parallels working on Mountain Lion

Lukeit
Feb 19, 2012, 09:57 AM
None of you guys has problems with spotlight or with file search in general from finder search bar?
I find I can't make a search in sub folders and the results delivered are total, what I mean is that I can't, for instance, narrow my search clicking a specific folder or volume ...
Anyone reports the same?

Nielsenius
Feb 19, 2012, 11:20 AM
I'm currently using Mountain Lion as my primary OS. Overall, it's very stable. Here are the issues I've noticed:

- Completely crashed when playing Minecraft (not frequently, just once)
- Issues connecting to Cinema Display:
* Mini Displayport audio is erratic. USB audio works.
* Freezing when waking from sleep (so, I set to only display sleep when connected to power)
* Can reboot successfully when connected to display. Can't cold boot without freeze.
- Launchpad key on Bluetooth keyboard doesn't work.

Most apps seem fine (latest release of Aperture didn't work). I used the Lion dev previews last year. There were numerous graphical issues with them. Mountain Lion seems much more stable.

One word of warning: downgrading from 10.8 to 10.7 may be difficult. I believe that 10.8 installs some new firmware onto the logic board (EFI). This was preventing me from booting from Lion (even after wiping the disk and installing fresh).

igo4mtns
Feb 20, 2012, 06:20 AM
I've experienced one kernel panic (MacBook Pro) and several episodes (MacBook Air) of Safari abruptly quitting or not responding to keyboard input without restarting (of Safari).

*LTD*
Feb 20, 2012, 10:01 AM
Been very solid so far. Even more so than Lion's first preview release.

Evernote's crashy, though.

Tmelon
Feb 20, 2012, 11:26 AM
I replaced Lion with it and I've had no issues at all. It's just as stable (if not more so) than Lion. The only issues I've seen are incomplete features that will hopefully be added in DP2.

Verto
Feb 20, 2012, 12:25 PM
I have problems with Safari. If I have extensions enabled, then almost every website I try to access will bring up a fail to load screen. Once I disable extensions, problem solved. Other than that, everything has worked fine so far.

Sdreed91
Feb 20, 2012, 12:36 PM
Works okay for me. The only thing i have had trouble with is programs coming forward. For instance i have the messages up in front and i click on safari behind it safari does not come to the foreground. Other than that it works really well. Feels snappier.

class77
Feb 20, 2012, 12:40 PM
Is the hated "Versions" gone with ML or at least the ability to turn on a "save as" feature??

maflynn
Feb 20, 2012, 12:51 PM
There is no Save As in ML, and there are versions so to answer your question - its still there.

Cougarcat
Feb 20, 2012, 12:54 PM
There is no save as but the feature is now replicated when you duplicate. The title bar becomes highlighted and you can change the name of the document right there.

Schtumple
Feb 20, 2012, 01:01 PM
I would never recommend it as your primary OS. Whilst things are stable now, you really can't predict what will happen in the future.

RJCP
Feb 20, 2012, 02:00 PM
More stable and snappier than any of Lion's DP's ever were and even Lion retail to some extent.
I have experienced a FPS rate with launchpad, mission control and dock animations that I never got with Lion; booting time is noticeably faster and overall, the system really feels very stable and snappy. Apps open very quickly, Finder is lightning fast (on lion it takes about one second after i click the icon to get a window), Safari also seems much snappier than the current Lion build.

I really think ML will be a very very good release!

P.S.: I'm running a clean instal on a new partition in my main HDD. I wouldn't use it as a primary OS right now because there's a lot of incomplete text and the ocasional bug here and there.

unobtainium
Feb 20, 2012, 02:52 PM
Wirelessly posted (Mozilla/5.0 (iPhone; CPU iPhone OS 5_0_1 like Mac OS X) AppleWebKit/534.46 (KHTML, like Gecko) Version/5.1 Mobile/9A405 Safari/7534.48.3)

Is Aperture 3 working for anyone on Mountain Lion? What about Dropbox?

87racer
Feb 20, 2012, 03:10 PM
Wirelessly posted (Mozilla/5.0 (iPhone; CPU iPhone OS 5_0_1 like Mac OS X) AppleWebKit/534.46 (KHTML, like Gecko) Version/5.1 Mobile/9A405 Safari/7534.48.3)

Is Aperture 3 working for anyone on Mountain Lion? What about Dropbox?

Dropbox is working but icons on the files don't show up. Files are syncing though.

kirky29
Feb 20, 2012, 03:31 PM
Wirelessly posted (Mozilla/5.0 (iPhone; CPU iPhone OS 5_0_1 like Mac OS X) AppleWebKit/534.46 (KHTML, like Gecko) Version/5.1 Mobile/9A405 Safari/7534.48.3)

Is Aperture 3 working for anyone on Mountain Lion? What about Dropbox?

I tested Aperture 3 and it was working fine on my installation. :)

Lukeit
Feb 20, 2012, 07:13 PM
I wouldn't recommend as main OS stable, but unpredictable.
Very different overall result the installation on iMac and mid 2009 MBP; much better and more stable on iMac than on laptop where Messages, Mail and Cloud crash without even opening.
Safari is fast but buggy, occasionally doesn't load images or doesn't load pages properly.
As said previously, finder search and spotlight are malfunctioning and are not 100% reliable.
waiting for DP2!

linkboy
Feb 20, 2012, 07:43 PM
I went and erased my Lion partition and reinstalled Snow Leopard and then did the install to Mountain Lion from a clean SL install (probably didn't do anything, but I wanted to wipe my OS X partition anyways).

Anyways, ML has been pretty damn stable for me so far. Has it had some quirks, yes, but hey, its still beta.

Even in this early state, its much better then Lion. Can't wait until its done.

Nielsenius
Feb 20, 2012, 08:40 PM
Wirelessly posted (Mozilla/5.0 (iPhone; CPU iPhone OS 5_0_1 like Mac OS X) AppleWebKit/534.46 (KHTML, like Gecko) Version/5.1 Mobile/9A405 Safari/7534.48.3)

Is Aperture 3 working for anyone on Mountain Lion? What about Dropbox?
Aperture 3.1 is working, but 3.2.2 (latest) crashes.

Steve.P.JobsFan
Feb 20, 2012, 09:05 PM
Hey, Everybody!

I'm (finally) buying my new iMac this Saturday, since my Mom's tax return deposits tomorrow! (I'm paying for half the iMac, though)

Anyways, I want some advice. When I heard about ML, I took $99, and bought a membership to the Mac Developer Program. I downloaded ML tonight. Now, I'm buying the $1499 config of the 21.5" iMac. Specs below.

21.5-inch: 2.7GHz
2.7GHz Quad-Core Intel Core i5
1TB hard drive
AMD Radeon HD 6770M with 512MB

Now, I had 8GB of RAM delivered from Crucial today, so I'll actually have 12GB RAM instead of 4GB RAM. I am considering wiping the HDD, and fully going Mountain Lion. I have Lion on a USB drive in case I want to revert. Is Mountain Lion stable enough for day-to-day work, and to jump over?

pdjudd
Feb 20, 2012, 09:07 PM
There is already a thread talking about the stability of ML

http://forums.macrumors.com/showthread.php?t=1326044

ECUpirate44
Feb 20, 2012, 09:09 PM
Bad idea if you're not a dev.

Cougarcat
Feb 20, 2012, 09:10 PM
It's a beta OS, so I would advise against it unless you know what you're doing. If you really want to, I would clone your HD with all your apps to an external, and then install ML onto that. Use it for several days and see if your apps are compatible before you decide to take the plunge.

ghall
Feb 20, 2012, 09:11 PM
No. I wouldn't recommend it. It's still in the developer preview stage, therefore it's very unstable and still has many bugs. Some apps don't work right in it either.

Hell, some people here would recommend waiting until the final release at least gets a bug fix or 2.

Tmelon
Feb 20, 2012, 09:11 PM
Hey, Everybody!

I'm (finally) buying my new iMac this Saturday, since my Mom's tax return deposits tomorrow! (I'm paying for half the iMac, though)

Anyways, I want some advice. When I heard about ML, I took $99, and bought a membership to the Mac Developer Program. I downloaded ML tonight. Now, I'm buying the $1499 config of the 21.5" iMac. Specs below.

21.5-inch: 2.7GHz
2.7GHz Quad-Core Intel Core i5
1TB hard drive
AMD Radeon HD 6770M with 512MB

Now, I had 8GB of RAM delivered from Crucial today, so I'll actually have 12GB RAM instead of 4GB RAM. I am considering wiping the HDD, and fully going Mountain Lion. I have Lion on a USB drive in case I want to revert. Is Mountain Lion stable enough for day-to-day work, and to jump over?

For a first developer preview it's very stable but there are a still a few kinks that need to be worked out. I'm running it as my primary OS right now without trouble, but others have reported differently.

Partron22
Feb 20, 2012, 09:24 PM
Wipe Lion and go full ML?

No.
That is literally asking for trouble.
ML is beta for a reason.
It's not thoroughly tested.
Do you want to be a fulltime beta tester?
Why? There's not a lot of nerd points in it.

tjb1
Feb 20, 2012, 09:32 PM
No.

whoathere
Feb 20, 2012, 09:41 PM
I wouldn't make that leap just yet.

pdjudd
Feb 20, 2012, 09:49 PM
I agree. Developer preview releases are intended to be for developers who need an idea of what the OS is going to do so that they can update and test their software with a version that is near feature complete (but not necessarily stable). It is not intended to be used on a day to day basis. Itís for testing and development so that you can get your apps done as soon as the OS ships.

pmz
Feb 20, 2012, 09:49 PM
Hey, Everybody!

I'm (finally) buying my new iMac this Saturday, since my Mom's tax return deposits tomorrow! (I'm paying for half the iMac, though)

Anyways, I want some advice. When I heard about ML, I took $99, and bought a membership to the Mac Developer Program. I downloaded ML tonight. Now, I'm buying the $1499 config of the 21.5" iMac. Specs below.

21.5-inch: 2.7GHz
2.7GHz Quad-Core Intel Core i5
1TB hard drive
AMD Radeon HD 6770M with 512MB

Now, I had 8GB of RAM delivered from Crucial today, so I'll actually have 12GB RAM instead of 4GB RAM. I am considering wiping the HDD, and fully going Mountain Lion. I have Lion on a USB drive in case I want to revert. Is Mountain Lion stable enough for day-to-day work, and to jump over?

Pretty poor idea. ML is not the least bit stable. Use Lion.

Buying a Mac Dev membership to run buggy software for a few minutes is the worst use of $99 I can possibly think of.

pmz
Feb 20, 2012, 09:55 PM
ML is getting worse as days go on. Brand new bugs each day.

Recommending it to anyone as their only OS is a very, very poor suggestion.

Despite what some people are saying, there are significant bugs...some people just haven't found them yet.

Its also working different of different machines.

ie: 5 year old iMac running fine with few bugs.

2011 MacBookPro quad core 8 GB of RAM 128 GB SSD, many bugs, slow graphics, stuttering Full Screen app transitions, some apps crashing, WiFi turning itself OFF during sleep (never seen this once before).

Today, Messages does not work at all.

There ARE issues. Don't even consider using it as primary OS

MonkeyBrainz
Feb 20, 2012, 10:00 PM
Wait until ML is released. Never make a beta preview your primary OS. That's just silly. At the very least, install it in a second partition (or external drive) if you want to toy around with it.

helios16v
Feb 20, 2012, 10:12 PM
At the very least, install it in a second partition (or external drive) if you want to toy around with it.

I completely agree however I have two iMac's to fall back on if anything goes wrong so I made it the Primary OS on my MBP and I've been using it fine every day since the 16th..well I didn't start using it until the 17th as I went to bed while it installed lol.

I did a clean install by making a bootable 10.8 USB stick.

Best bet though is to open Disk Utility and make a little partition of maybe 20GB just to install mountain lion onto and play around with it, see how buggy it is for a few days and if you think you can tolerate it then do a full wipe and use it as your main OS however I am not encouraging you to do so, Safari is very glitchy and no longer likes to tap click for me while using flash applications like youtube, I need to physically click for it to work but it works fine on Chrome and Firefox.

helios16v
Feb 20, 2012, 10:16 PM
I feel that this is just the missing update that I was expecting to see in Lion, with iOS 5 having all these new features and Lion coming out around the same time I just feel that this should simply be an update for Lion rather then an entire OS.

I'm using it as a day to day OS and I don't have any problems except tap to click doesn't work with flash on safari, other then that everything works perfect. tap to click works on firefox and chrome though.

Steve.P.JobsFan
Feb 20, 2012, 10:36 PM
Buying a Mac Dev membership to run buggy software for a few minutes is the worst use of $99 I can possibly think of.


I bought it because I want to start making Apps for the Mac, and ML is what convinced me to buy it.

ajvizzgamer101
Feb 20, 2012, 10:58 PM
Minor graphical bugs here and there, otherwise performance seems better than Lion. No slowdowns or crashes at all. Pleasntly surprised :)

iTunes sometimes doesn't respond. And I do get the graphical bugs that come with Full Screen.
Also having a hard time with messages, I can send or receive files. And can't chat with iPad, iPhone, iPod users.

ajvizzgamer101
Feb 20, 2012, 11:02 PM
I get so excited that I forget to make a new partition, at least I had enough blood in the brain to back up. :D

pdjudd
Feb 20, 2012, 11:07 PM
I bought it because I want to start making Apps for the Mac, and ML is what convinced me to buy it.

Unless you can devote a dedicated machine for testing, donít risk it unless you know what you are doing. If you want to learn developing, best to start on a stable platform with the latest version of Xcode - better than trying to learn about development and trying to debug a new OS. Itís going to take time anyway and you can upgrade later when things smooth out and you can check out the new APIís after they have time to bake.

DPís are about debugging existing software - not really for learning since anything can change.

Lukeit
Feb 21, 2012, 02:20 AM
ML is getting worse as days go on. Brand new bugs each day.

Recommending it to anyone as their only OS is a very, very poor suggestion.

Despite what some people are saying, there are significant bugs...some people just haven't found them yet.

Its also working different of different machines.

ie: 5 year old iMac running fine with few bugs.

2011 MacBookPro quad core 8 GB of RAM 128 GB SSD, many bugs, slow graphics, stuttering Full Screen app transitions, some apps crashing, WiFi turning itself OFF during sleep (never seen this once before).

Today, Messages does not work at all.

There ARE issues. Don't even consider using it as primary OS

TOTALLY TOTALLY AGREE 100%... quite smooth on my iMac, very poor and buggy on my newer MBP where mail, iCloud and messages crash without even opening! I know it's a beta, but how can I test it without being able to open such important apps?

musio
Feb 21, 2012, 05:32 AM
I completely agree however I have two iMac's to fall back on if anything goes wrong so I made it the Primary OS on my MBP and I've been using it fine every day since the 16th..well I didn't start using it until the 17th as I went to bed while it installed lol.

I did a clean install by making a bootable 10.8 USB stick.

Best bet though is to open Disk Utility and make a little partition of maybe 20GB just to install mountain lion onto and play around with it, see how buggy it is for a few days and if you think you can tolerate it then do a full wipe and use it as your main OS however I am not encouraging you to do so, Safari is very glitchy and no longer likes to tap click for me while using flash applications like youtube, I need to physically click for it to work but it works fine on Chrome and Firefox.

sensible post.

People are reporting all sorts of things but from what i read, a lot of people comment on how stable it is. Yes, there will be bugs and some unknown things may happen so if you do it, keep a regular time machine running. If stability and no downtime is no 1 importance, don't do it. The post above suggesting to see how it works for you personally really sums it up.

brunopinho
Feb 22, 2012, 08:02 AM
ML is getting worse as days go on. Brand new bugs each day.

Recommending it to anyone as their only OS is a very, very poor suggestion.

Despite what some people are saying, there are significant bugs...some people just haven't found them yet.

Its also working different of different machines.

ie: 5 year old iMac running fine with few bugs.

2011 MacBookPro quad core 8 GB of RAM 128 GB SSD, many bugs, slow graphics, stuttering Full Screen app transitions, some apps crashing, WiFi turning itself OFF during sleep (never seen this once before).

Today, Messages does not work at all.

There ARE issues. Don't even consider using it as primary OS

I have the same Imac 7.1 .. OS 10.8 pretty stable here except choppy/ lag scrolling in safari and chrome. How about yours?

pmz
Feb 22, 2012, 08:28 AM
I have the same Imac 7.1 .. OS 10.8 pretty stable here except choppy/ lag scrolling in safari and chrome. How about yours?

Same.

Its just funny to me how much slower/choppier/crashier it's on my much faster and 5 years newer MBP.

It's ok, I reinstalled Lion on the MBP and just downloaded Safari and Messages beta. Those are the best parts for now anyway.

I'm sure the DP2 will land within a month-month and a half. A summer release means more frequent beta releases.

WeegieMac
Feb 25, 2012, 02:46 PM
Personally, I'm using it as my primary OS on my iMac, which is a mid 2009 model and compared to Lion, this is a Godsend. My main issue was always with Lion's animations, they were awful and took away from the fluid operation of OS X, which is one of it's famed attributes in my opinion.

From opening/closing Launchpad, opening/closing folders within Launchpad, going to/from Full Screen mode in apps, and the animation where an app is downloaded from the App Store and sent to Launchpad, every version of Lion has run like a stuttering, inconsistent mess.

Mountain Lion, for DP1, is remarkably better on my iMac than even the latest version of Lion. Fingers crossed the final release is just as good, because Mountain Lion truly has, thus far, given me Snow Leopard quality performance but with the features of Lion.

organik
Feb 25, 2012, 03:00 PM
Anybody done this successfully? I jumped the gun and went full bore for ML, but it's a bit too buggy for daily use for me (I didn't do it on a work computer or anything - not a huge problem).

If I clone the drive and do a clean install of Lion, will I be able to migration assistant from my ML drive? I'm guessing not...

Or is there a way to install Lion on top of ML, keeping apps and user accounts?

Thanks -

monkeybagel
Feb 25, 2012, 04:00 PM
Wirelessly posted (Mozilla/5.0 (iPhone; CPU iPhone OS 5_0_1 like Mac OS X) AppleWebKit/534.46 (KHTML, like Gecko) Version/5.1 Mobile/9A405 Safari/7534.48.3)

Would not recommend it. Once you play with the new features for an hour or two you will want to revert to Lion to get application compatibility, unless you will be developing on it.

Meriana
Feb 25, 2012, 08:25 PM
It has a few bugs, and if you are concerned for your data, are not a pro user/developer, don't have a backup, don't use it. However i'm primarily developping on my macbook air, which is as well my only portable machine. I decided to go ahead and upgrade it to ML and see if it's stable enough for developping, emailing and surfing the internet. Which it is, so i kept it and didn't go back to Lion, it's just easier to have one installation than two.

negativzero
Feb 25, 2012, 09:56 PM
I've had 4 kernel panics in the past 3 days in addition to crashes from Safari, Mail, Contacts, Disk Utility and Bootcamp Assistant in addition to non-working apps like VMware, Onyx, etc...

I'll be re-installing Lion once I recall how to pop back my optibay.

Even as a developer, DP1 isn't even stable enough to work on. Frequent crashes and incompatibilities means you'll never know it was a result of your code or Apple's.

irnchriz
Feb 26, 2012, 12:43 AM
Running ML in Parallels 7, wouldn't use it as a Main OS until GM tbh. I run Lion on my Macs with no issues and wouldn't want to compromise them.

My iMac is my Main system and it runs a ton of stuff for work so it is much simpler/safer to experiment with a virtualised ML.

happyslayer
Feb 26, 2012, 01:14 PM
I'm using ML 10.8 as my main OS on my 2011 MBA and I have had very little issues with it. For me to properly evaluate and test a new OS, I need to be running it on my main machine as the primary OS. For me, this is the only way to figure out what works and doesn't. I do have a good backup of 10.7 install though :)

Admittedly, I don't run very many hardcore apps on it, though.

Mac mail, Office 2011 (Word, Excel, PPT & Outlook) iWork (occasionally), Safari, Scrivener2 (no issues!) and Dropbox are my primary apps that I use most.

The only real issue I've had is that Dropbox does not always start when I reboot. I occasionally (not always) have to manually double click the app to get it to show up in the menu bar. However, this also happens with iStat menus (latest update) so it could be related to that. I've just been too lazy to test it.

So for me it's been fine. However, as I said earlier, I also have a solid/tested Time Machine backup of my 10.7 install just in case.

If your Mac is crucial to your daily life and you can't imagine waiting for a Time Machine restore to finish... Don't use it as primary.

My two cents...