Just a notification in Notification Center that pops up.

If you have "SampleOverlap" issues ... use Monterey Beta 3 ... with Xcode 13 Beta 3 .... and make sure to re-download the sample app. Looks like the OS and Sample Code is in constant development .... had the same issue after updating to macOS Beta 3 with latest Xcode 3 beta 3 ... and after I downloaded the sample app ... it worked again.

Congratulations! :-) ... btw, Apple did kinda confirmed that they update the error codes in Beta 3 ... as "-11" was to generic ("hardware not supported") ... and "-21" is more specific ("Hardware GPU Not Enough VRam"). https://developer.apple.com/forums/thread/685208?answerId=682423022#682423022

Thanks for answering my question :)

When I did a fresh re-install of macOS 12.1 (non-beta) ... I still got it the message on my MacBook Air 13". But it was like once / very very seldom ... that it pops up again. (I see an improvement, since the "Beta stage" ...)

... well, that was a looooooong time ago, we had those MacBook's wink-wink 😁 But ... thinking about it .... if I have failing RAM memory ... why doesn't Big Sur or Catalina ... give the same error message? ... or that when I run the built in Diagnostic (hold "D" when you reboot, and you'll get into it ...) mode ... I doesn't warn / say anything about "Failing RAM" ... Glad swiping memory helped you 😊 ... but like a "logical vulkan (star trek) mind", it doesn't really compute PS. if you have an older mac, where "D" doesn't work ... try this: https://github.com/upekkha/AppleHardwareTest

Thanks @robnotyou. So it's an extension of if, to fix the issue that coughfacebookcough (and the like) where circumventing 👍

Thanks @eskimo. I have filed one in FBA (FB9842248) and one with the Little Snitch devs.

@jeet9 ... IIRC ..macOS Big Sur is Optimized for M1. Though, you'd had to 1st back-up all of your files to an external disk ... and do a total re-install (including re-formatting the entire disk). But make sure you 1st have backed-up everything. There is no "going back" when you do a total re-install with re-formating the disk.

Mmm, I have noticed that too. Why I choose to use Firefox as the web browser in Monterey. As it didn't crash the system as often.

I had this issue too ... it turned out that the SSD partition table got corrupted (happened when I played around why my test rigg). Try to re-format the entire disk and to a total clean install. BUT - 1st make sure to backup all of your files to an external drive.

@akontaroudis ... the entire disk. Helps if you 1st format it ExtFAT with MBR-partition table. And then do an AFPS with GUID-partition's ...