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Fine

2008 8-core running Mavericks smoothly. Installed 10.9 about 2 days after it came out and haven't noticed any problems with it at all. Use it for standard stuff (email, web browsing, Office stuff, iTunes, iPhoto), as well as Photoshop, Lightroom, Premiere, and some light-medium gaming.
 
I have two Mavericks and Mac Pro issues that I can't resolve. I think both will require fixes from apple.

1) Firewire drives are slow to mount and will not sleep. This appears common to firewire and maybe thunderbolt drives.

2) IPv6 addresses given by my router to my Mac Pro are lost when waking from sleep. I connect via ethernet and the problem appears limited to ethernet. When this happens, back to my mac and iTunes wifi sync break….Note: iTunes must be running when the Mac Pro goes to sleep for the IPv6 to be lost.
 
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4,1 with dual 2.93ghz quads and 32GB RAM. Bootcamp in sled 1, OWC SSD with 10.9 in 2, then 3TB drives in 3 and 4 for data back ups, clones etc.

I've found my boot times are around a minute now, with most of that time my screens being black. Once the grey Apple logo pops up then its back to regular SSD speeds again.

On my EFI selector page I have about 6 drives I can potentially boot from. Not sure if Mavericks does some kind of check on these that ML didn't. I do have my proper boot drive selected in system preferences though.

After this thread gave me the impetus to actually try and do something about my slow boot up times I decided to time things.

Boot up to grey Apple screen was 47s
Boot up to log in screen 71s

Performed a PRAM reset (this is always the general cure all that people throw up for fixing all sorts of problems but usually it does bugger all). In this case, Apple recommend PRAM reset for slow boot. So I gave it a go.

Boot up to grey Apple screen is 18s
Log in screen pops up after 27s

I don't know what could have gone bonkers in the PRAM which would make my boot up times become so slow, by simply installing Mavericks compared to Mountain Lion (this problem only arose after upgrading).
 
Glad it worked out for you!

I honestly don't know what random variables may be reset/fixed by resetting PRAM, but I've had to do it a few times after plugging, unplugging various cards, and then everything goes back to working as expected. In my case, I've had issues with some OWC eSATA cards, interfering with the MP's built-in USB (ports magically stop working or become inconsistent, one by one, until PRAM is reset, or the OWC card gets pulled).

I don't really understand the obsession with boot times on a Mac Pro, the more crap you have plugged into it and the greater your RAM, the longer it will take. But how often do you actually reboot the thing? My personal machine and all the production boxes we have get rebooted every few months when there's an OS/X update, or significant update to some app/card combo we're using. Average uptime tends to be several months.

So far Mavericks has continued being a relatively problem-free experience for me. <knock on aluminum>.

The tl;dr mini-review would be:

Snow Leopard: very stable, but very ancient at this point, lacks too many drivers for new hardware.

Lion: this was kind of a mess for a while.

Mountain Lion: Cleaned up most of the mess from Lion.

Mavericks: Seems to be highly optimized since the lower-end consumer gear is gaining more RAM and cores, all of this has drifted up to making your Mac Pro mo' betta faster! Very happy with it so far. Yes there's more fluffy crap and even tighter fb and twitter and whatever integration that I'm never going to use, but nothing awful seems to have happened to the core OS/foundation, it's actually improved.

I go drink coffee now.
 
2012 5,1 with dual 6-cores and 128GB of memory.

Upgraded to 'Maverisks' using the upgrade method and not a fresh install.

Went this route and the upgrade did inform me that since I am running my OS on a raid, it would not be able to install 'Back to my Mac'. I had used the custom method of creating a recovery partition when I did a fresh install of ML.

So far, everything is running great. A little nagging when reopening some apps as it displays a dialog box asking me if the app is safe to open such as VLC.

I only had a few app crashes which I then reopened the app, mostly Apple Mail, and then continued working again.

An odd thing, I have not been able to determine if it is Mavericks or Apple Mail, even after the Mail update, is that when I move an email on my Macbook Air, also on Mavericks, to a sub directory, it may not update the same email on my Mail app on my Mac Pro.
 
I have two Mavericks and Mac Pro issues that I can't resolve. I think both will require fixes from apple.

1) Firewire drives are slow to mount and will not sleep. This appears common to firewire and maybe thunderbolt drives.

2) IPv6 addresses given by my router to my Mac Pro are lost when waking from sleep. I connect via ethernet and the problem appears limited to ethernet. When this happens, back to my mac and iTunes wifi sync break.

Two questions:

1) Which Mac Pro are you using? Sorry, didn't see it in the thread anywhere, maybe I'm blind…

2) What router are you using? I have a 2009 AEBS. The chain is cable modem > AEBS > 2008 Mac Pro via ethernet. I enabled IPv6 on the AEBS about 6 weeks ago and have had zero problems on the Mac Pro or any of the wireless devices the AEBS supports.

But I'm still on ML 10.8.5 and contemplating whether to upgrade to 10.9 now or maybe wait till 10.9.x --- so your experience with IPv6 over ethernet is interesting to me.
 
Glad it worked out for you!
I don't really understand the obsession with boot times on a Mac Pro, the more crap you have plugged into it and the greater your RAM, the longer it will take.

For me it was not so much an obsession about the boot time, but more trying to get to the bottom of why my system was not performing at it used to. A tripling of the boot time did not seem normal to me; and I wanted to figure out why my machine was "broken".

As my machine would spend quite a lot of time "thinking" before anything would even appear on the screen, it appears that something went wrong with the EFI boot selector process. PRAM stores info on which drive to boot from and this much have gotten garbled. As I have 6 drives/clones that I could potentially boot from, it must have been stumbling over these.
 
Two questions:

1) Which Mac Pro are you using? Sorry, didn't see it in the thread anywhere, maybe I'm blind…

2) What router are you using? I have a 2009 AEBS. The chain is cable modem > AEBS > 2008 Mac Pro via ethernet. I enabled IPv6 on the AEBS about 6 weeks ago and have had zero problems on the Mac Pro or any of the wireless devices the AEBS supports.

But I'm still on ML 10.8.5 and contemplating whether to upgrade to 10.9 now or maybe wait till 10.9.x --- so your experience with IPv6 over ethernet is interesting to me.

I have a new AEBS. No issues at all with ML 10.8.5. The issue is with Mavericks. The local-link IPv6 gets assigned at boot but after sleeping it is lost.

It's a mid-2012 Mac Pro 5,1
 
Using Mavericks on the 1,1 MP in my sig. Zero issues, runs waaay better than Lion or ML.

Despite running it like a hackintosh (Chameleon) I wouldn't be able to tell the difference. Everything works, BT, WiFi (built-in), SSD trim, everything.
 
I have a new AEBS. No issues at all with ML 10.8.5. The issue is with Mavericks. The local-link IPv6 gets assigned at boot but after sleeping it is lost.

It's a mid-2012 Mac Pro 5,1

Understood -- the issue is with Mavericks -- and that's why I find it interesting. It has bearing on my decision about whether to upgrade now or later.

I started looking into it and stumbled over this and see you left a comment. I gather that trying

System Preferences > Network > highlight Ethernet, click Advanced > IPv6: change to Link-local Only > Hit Renew DHCP Lease > OK > Apply

didn't have any affect on your problem. And I spotted this MacRumors thread where others have the problem, too.

Maybe someone with the 10.9.1 beta will comment whether it's patched, or if you install 10.9.1 when released you can come back and comment.

Either way, thanks for highlighting the issue.
 
no problems here really.

USB3 card and Apricorn card both working fine. Haven't noted any issues apart from the Mail app probs (seem less since the update, but occasionally it does refuse to quit).

all this on a Hex 5.1 with multiple drives etc.
 
Understood -- the issue is with Mavericks -- and that's why I find it interesting. It has bearing on my decision about whether to upgrade now or later.

I started looking into it and stumbled over this and see you left a comment. I gather that trying

System Preferences > Network > highlight Ethernet, click Advanced > IPv6: change to Link-local Only > Hit Renew DHCP Lease > OK > Apply

didn't have any affect on your problem. And I spotted this MacRumors thread where others have the problem, too.

Maybe someone with the 10.9.1 beta will comment whether it's patched, or if you install 10.9.1 when released you can come back and comment.

Either way, thanks for highlighting the issue.

This bug apparently affects people who use thunderbolt to ethernet adapters as well as those who use the built in ethernet ports. If you use ethernet and leave iTunes running when your mac goes to sleep, the IPv6:IPv4 tunnel for things like iTunes wifi sync and back to my mac gets broken. This does not happen with wifi from my testing.

It may be possible to bring down the en0 interface and then bring it back up to fix the problem when you wake. I haven't tested all the work arounds. You would need to be at the console to do this however.

I use my mac pro as both media server and workstation. I also connect back to it from the office to fix things for the family or start media conversions/downloads. So for me, I ran straight into the this issue.

I also have fW external storage arrays. The only work around here is to convert to usb. I'm not happy using with the speed reduction but it's workable until resolved by apple.

I use Mavericks on my MBA but my main Mac Pro system is still 10.8.5. I have a test partition for Mavericks that I will continue to test with before it goes on the main drive and migrates through my backups, clones, & remotes.

My test partition with Mavericks was the totally clean kind (no setup assistant, no migration assistant).
 
Lots of problems:

Bizarre Safari behavior - open undisplayed windows cannot be redisplayed, new window request ignored, after restart unreliable operation altogether. Must kill and restart several times before it works properly. Multiple Safari crashes.

Mail - strange smart folder behavior with fantom unread messages

USB drive - system goes to sleep disconnecting a dismounted USB drive, sometimes just restarts.

Screen tearing with multiple monitors, have to restart the system with all monitors on (with 5770).

iCloud keychain a bit wonkey.

This is the most unreliable release of OS X in many a moon, IMHO.

Also, I don't care at all for the new icons and flat user interface. Like most corrections this one went way beyond getting the skeuomorphic stuff under control.

Worst of all by a mile - inability to sync contacts through iTunes. Just Plain Dumb.

I will not be an early adopter ever again.
 
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