Wait, the Mac Studio has worse single core perf than an iPad Pro? that's absurd.

Release candidate was up on the developer site for a week and another comment says that only a subset of people are having the problem . It would seem that the group is some kind of anomaly that never got a release candidate installed also.

You know Microsoft has to deal with all sorts of various hardware configurations as do all the OEMs.

Apple has like 10. All in-house.

You could fit their whole lab in a spare bedroom.

There is no excuse for this.

From what the article says, this is specifically a problem when updating from an OS version released two days ago, to the other OS version released two days ago. That's not exactly the most logical or likely path for most users to take, though obviously Apple needs to be able to handle this going forward for users who are hesitant to update to 26 and want to run 15.7 in the meantime.

There can be outlier bugs, that only appear for a small subset of users, under certain conditions (from different OEM parts combo among dozens to different software packages installed, update paths followed, or options enabled).

Did you read the post?

>I don't know what does

Something that's not a rare issue affecting some handfuls of users of just a particular model?

Some of the classic releases that are esteemed as "Apple's most well managed and stable", like Snow Leopard, had worse issues than this.