Is there any evidence of Mail.app data loss in Big Sur?

[Arctic Moose]

There is no mention of Big Sur 11.0.1 in the 15-page Catalina thread on the topic:

PSA: Apple Mail Bugs Can Lead to Data Loss in macOS Catalina

Michael Tsai, the developer of EagleFiler and the SpamSieve plug-in for Apple Mail on Mac, has written a blog post warning macOS users about potential data loss in Mail when upgrading to macOS Catalina 10.15.0 (build 19A583). According to Tsai, he's heard from several users that updating Mail's...

forums.macrumors.com

Michael Tsai has received reports of the IMAP moving bug in the Big Sur beta, but there are no details:

Michael Tsai - Blog - Mail Data Loss in macOS 10.15

I kept putting off upgrading to Catalina because I really do not want to have to perform forensics on my mail archives that have been pedantically curated since 1995.

I now have several very good reasons to upgrade to Big Sur, I am simply wondering if anyone has any reliable evidence of data loss bugs in the Big Sur Mail.app?

 

[canuckRus]

There is no mention of Big Sur 11.0.1 in the 15-page Catalina thread on the topic:

PSA: Apple Mail Bugs Can Lead to Data Loss in macOS Catalina

Michael Tsai, the developer of EagleFiler and the SpamSieve plug-in for Apple Mail on Mac, has written a blog post warning macOS users about potential data loss in Mail when upgrading to macOS Catalina 10.15.0 (build 19A583). According to Tsai, he's heard from several users that updating Mail's...

forums.macrumors.com

Michael Tsai has received reports of the IMAP moving bug in the Big Sur beta, but there are no details:

Michael Tsai - Blog - Mail Data Loss in macOS 10.15

I kept putting off upgrading to Catalina because I really do not want to have to perform forensics on my mail archives that have been pedantically curated since 1995.

I now have several very good reasons to upgrade to Big Sur, I am simply wondering if anyone has any reliable evidence of data loss bugs in the Big Sur Mail.app?

Upgrade to BigSur screwed up my email mailboxes royally. No longer had an iCloud mail section. Everything lumped together.

 

[Carrotcruncher]

I am so disappointed with this M1 Mac, as usual the software is a mess, the mail app won't even show a window a lot of the time, window management is completely busted on this chip, obviously someone just hodgepodge the os together and its awful, expanding windows makes the window disappear under the taskbar meaning you have to faff around to resize it, dual monitors is a complete mess, with things appearing disappearing and popping up wherever they feel like, Apple should be ashamed, this thing may look good on benchmarks, but to actually use its horrible, its like having a dolly bird, she might look good but she can't cook you a meal !

 

[Arctic Moose]

How about 11.1? Any Mail data loss issues?

 

[tangfish]

I’m in the same exact boat. Have been patiently waiting and using Mojave. Can’t afford any risk of email data loss. I watched every update to Catalina roll out and never saw that issue definitively addressed and resolved (plenty of people who said they didn’t happen to notice any missing emails- but that wasn’t reassuring enough).

So here we are at Big Sur and the waiting game continues....

 

[robgendreau]

I had big issues with Mail.app when moving to Catalina, and before that.

I just updated to Big Sur 11.1, and had no issues with Mail. Even my plugins are working.

But after the Catalina disaster, I mostly use MailMate as a client. I have accounts at Google, Apple, and various other providers, all IMAP. And I use Tsai's SpamSieve and his Eagle Filer to store critical emails.

 

[Arctic Moose]

I took the plunge and upgraded to 11.1 today after backing up to Time Machine and Backblaze, and making a SuperDuper clone.

The upgrade was smooth enough, and so far everything looks more or less fine in Mail. All the mailbox message counts look correct except that a few smart mailboxes containing thousands of messages have 1-6 messages more than they did before.

All the totals in "account info" for each account looks correct too.

The only issue so far is that I have multiple Drafts/Junk/Trash located "On My Mac", most of them empty.

 

[GylesM]

Has anyone had an issue with the colored flags in Apple's mail client with Big Sur? For my business, I use various flag colors to denote things like priority and how long I plan to keep an email. Yesterday, I was flagging a few emails on my iPad, and noticed a bit later that a flag I made blue had turned back to red. I went on my iMac and discovered that hundreds of emails all had their flags changed from some color to red. Well I'm pissed. Probably way too much work to fix it back. Don't know if the problem was caused by a bug on the iPad, iMac or iCloud. I just wish that roll out of operating system and app updates didn't destroy stuff that had previously worked.