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Which apps don’t work? Does ms office work?

I believe ms office work haven't tried it but I did saw on another thread that it does, the that work for me are productivity app but rather customization such Liteicon (The website states that an update is being worked on but they will be some limitations), xtraFinder, NepTunes (crashes with some song in Apple Music). But I think most of the Productivity & Popular apps out there already work on Big Sur or at least betas.

have you checked this wiki macOS Big Sur working/not working?
 
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After the third major Catalina update, my 2012 MPB wouldn't safe-sleep or hibernate. It just runs down the battery when the lid is closed and then crashes when I plug it in and power it back up. Did all the SMC, NVRAM resets and such and adjusted the pmset parameters. Tried a fresh Catalina install on a fresh SSD.

I thought it was my MacBook, but a couple weeks ago I went back to Mojave and it's working perfectly. I've read about the same problem on the same machine from a few people, including on the forums here.

This is why I’m going from Mojave to Big Sur (once it’s verified as stable).
 
I am in this boat. While I’ve waited on a major version upgrade until the first or second minor revision, I’ve never held back anywhere close to this long, nor have I ever skipped an entire OS X version like it looks like I will end up doing with Catalina.

There are lots of people here saying they don’t have issues after the update but basically the best case scenario for me seems to be upgrading without problems but then also no real must-have improvement or new features, since Mojave is working so well for me as of now.
Mojave had 3 supplemental updates around the time of the Catalina release. I upgraded from High Sierra after the 3rd SU. I had none of the issues with Mojave that everyone else did (simply because I waited until after the bugs were fixed).

I'm waiting for a 3rd supplemental update to Catalina. Apple usually release 1 more SU to the last OS after they release the new OS. If there's not a 3rd SU by the time Big Sur is updated to .1 or .2, I'll take the leap to Catalina in December.

In my work circle, we all stay perpetually 1 release behind. All things being relative, we still upgrade annually. This is the way.
 
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After the third major Catalina update, my 2012 MPB wouldn't safe-sleep or hibernate. It just runs down the battery when the lid is closed and then crashes when I plug it in and power it back up. Did all the SMC, NVRAM resets and such and adjusted the pmset parameters. Tried a fresh Catalina install on a fresh SSD.

I thought it was my MacBook, but a couple weeks ago I went back to Mojave and it's working perfectly. I've read about the same problem on the same machine from a few people, including on the forums here.

I used to have a similar problem with another mid-2012 MacBook Pro with 1 GB VRAM and the 650M hardware back in 2015. At that point, I just shut it down every time. This one, with the 650M and 512 MB sleeps fine, for some reason, although I haven't taken it on a trip, which is where the other one regularly failed.
 
This is why I’m going from Mojave to Big Sur (once it’s verified as stable).
It's still a good idea to upgrade to Catalina even if only for a day or a week. I made the mistake of doing a clean install back around Mountain Lion, when Apple moved where iChats were stored locally (before iCloud). Those chats are forever trapped outside of Messages. Not a big deal but the lesson was that each OS needs to be upgraded. Don't break the chain.
 
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It's still a good idea to upgrade to Catalina even if only for a day or a week. I made the mistake of doing a clean install back around Mountain Lion, when Apple moved where iChats were stored locally (before iCloud). Those chats are forever trapped outside of Messages. Not a big deal but the lesson was that each OS needs to be upgraded. Don't break the chain.

That’s a good point and thanks for the example of a downside to skipping a generation entirely.

If I knew for certain I wouldn’t lose any Mail data, I’d upgrade to Catalina. But there doesn’t seem to be a definitive statement by Apple that the issue was complexity fixed, just random accounts by people thinking that most of their email seems to be there (which isn’t good enough imo).
 
Yes, and it's faster.
Are you saying that a Safari update was built into the Supp Update and it went from 14.0 to ? I have been holding off applying the stand alone Safari 14.0 update from last month. Can someone please confirm that an update to Safari 14.0 is built into the new Supp Update? And the new Safari build number? Or is everyone still on Safari 14.0 after the update?
 
Are you saying that a Safari update was built into the Supp Update and it went from 14.0 to ? I have been holding off applying the stand alone Safari 14.0 update from last month. Can someone please confirm that an update to Safari 14.0 is built into the new Supp Update? And the new Safari build number? Or is everyone still on Safari 14.0.
There is no change to Safari in the 10.15.7 supplemental update.
 
Mojave had 3 supplemental updates around the time of the Catalina release. I upgraded from High Sierra after the 3rd SU. I had none of the issues with Mojave that everyone else did (simply because I waited until after the bugs were fixed).

I'm waiting for a 3rd supplemental update to Catalina. Apple usually release 1 more SU to the last OS after they release the new OS. If there's not a 3rd SU by the time Big Sur is updated to .1 or .2, I'll take the leap to Catalina in December.

In my work circle, we all stay perpetually 1 release behind. All things being relative, we still upgrade annually. This is the way.

Unfortunately the following issues are unknown:
- is Mojave affected by this critical security vulnerability? Probably yes.
- Will Apple fix the vulnerability? When? => Apple's behaviour is unacceptable.

So... you continue to use Mojave even though the above issues are not resolved? Do you not care about this serious security problem?
 
We need an update to stop the mail application from opening by itself. I called Apple on this and a lot of people are having this problem.
 
Mojave has anther year of security updates yet, no need to migrate to either of the disasters that are Apple's last two OS releases.
Everyone keeps talking about security updates. Honestly, I'm fine using Mojave WELL beyond the last security update.
I've had macs, even ones with really old os's (like Lion or Mountain Lion) and somehow my computers never blew up without those precious security updates.

@k27
 
And we who installed Catalina through dosdude patcher in Mac Pro 5.1, do we have to install the whole system again because no update is coming naturally? I changed videocard (again) to an AMD Radeon RX570, and I thought that small updates should be reached. I asked dosdude on his Twitter once about this, but got no answer.
 
Everyone keeps talking about security updates. Honestly, I'm fine using Mojave WELL beyond the last security update.
I've had macs, even ones with really old os's (like Lion or Mountain Lion) and somehow my computers never blew up without those precious security updates.

@k27
You do have a valid point
 
After the third major Catalina update, my 2012 MPB wouldn't safe-sleep or hibernate. It just runs down the battery when the lid is closed and then crashes when I plug it in and power it back up. Did all the SMC, NVRAM resets and such and adjusted the pmset parameters. Tried a fresh Catalina install on a fresh SSD.

What does
Bash:
pmset -g assertions
show? You're looking for any processes that "prevent" sleep. I know I had the same issue and it was tied to HID (some USB device driver or util) and my use of Apple's 'AU Lab' with an AudioUnit plugin to boost output volume (go figure… audio preventing sleep). Some apps stupidly, wildly grab assertions… for little reason.
 
We need an update to stop the mail application from opening by itself. I called Apple on this and a lot of people are having this problem.
When exactly is this happening to you and how? This has been reported for Mojave also and has happened to me about 8 times in the last two years. So infrequently that I have ignored. But for me, the Mail app is already open, but hidden, and when I am in Safari full screen, the split screen Mail window will just automatically show up while I'm watching a video. No incoming mail or any other mail activity makes this happen. Is this the same for you?
 
When exactly is this happening to you and how? This has been reported for Mojave also and has happened to me about 8 times in the last two years. So infrequently that I have ignored. But for me, the Mail app is already open, but hidden, and when I am in Safari full screen, the split screen Mail window will just automatically show up while I'm watching a video. No incoming mail or any other mail activity makes this happen. Is this the same for you?
I don't know about him, but it's the same for me, just as you described. Happens rarely so I ignore it.
 
Why don't they have a minor version number instead of calling it a supplemental update?

I just updated and there is no way to tell whether or not the update actually happened.

Edit: @Unsupported showed me how to find it. That can also be found under
About This Mac -> System Report -> Software
But having a minor version number would be so much easier.
Another way to see that it was installed, along with an informative history of when your update and previous updates were installed, is to use the command `softwareupdate` in terminal as such:

To List Available Updates: { dash L }

john@macbook% softwareupdate -l
Software Update Tool

Finding available software
Software Update found the following new or updated software:
* Label: macOS Catalina 10.15.7 Supplemental Update-
Title: macOS Catalina 10.15.7 Supplemental Update, Version: , Size: 1184946K, Recommended: YES, Action: restart,
john@macbook% _

After you have completed installation of the update, a re-iteration of softwareupdate -l, should come up with no updates available.

Also...

List Update History: { dash dash history } *Only showing a few for brevity:

john@macbook% softwareupdate --history
Display Name Version Date
------------ ------- ----
Mobile Device 1.0.0.0 11/02/2020, 13:32:18
macOS Catalina 10.15.7 Update 09/29/2020, 13:00:02
macOS Catalina 10.15.7 Update 09/24/2020, 22:04:22
john@macbook% _
 
it seems there is at least 2 issues, discovered after the update (by multiple users):
- login screen is default again (no more custom user's background)
- display mirroring broken (wired)
 
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