Beware upgrading to LRC 10.1 on mac OS
Since this LRC forum still has an announcement from December 8 celebrating the release LRC 10.1 pinned at the top of the list, somebody has to say this bluntly:
If you are running mac OS, upgrading to LRC 10.1 could be a bad move.
Personally, I would say just leave it alone. If you're still at version 9, you might want to stay there for now. Moving to LRC 10 will force an upgrade to your catalogs, making it difficult to revert to version 9. If you're at 10.0, do not be tempted to upgrade to 10.1. It could certainly make your life much worse.
There are a huge number of users reporting freezing and crashing bugs with the 10.1 release on their Macs. I am one of them, and I have posted my own system console log clearly showing that the Mac's builtin GPU is locking up at the system level. For me, this causes the entire machine to sieze for 15 to 30 seconds, after which I regain control. Then it happens again, and again. For others, the symptoms are even worse. I can guarantee this is a real and serious problem.
Judging from recent traffic on this forum, I'm concerned that a great many users are being unwittingly hammered by this bug. We can only assume that a small percentage are actually showing up here in this forum to report their situation, and many more are just wondering what the heck is going on.
It seems that Adobe is well aware of this bug (how could they ignore it with so many reports coming from all over?). And yet, without acknowledging the devastating severity of this problem, Adobe tech support's only advice has been to disable the GPU. That is a highly unsatisfactory response. It is a tacit admission of serious bug for a piece of software that relies on a GPU for the computational performance that makes it a useful tool in practice. Would they also advise a motorboat owner with a broken engine to just switch to a pair of oars?
I am a career software developer, and I have a remarkably high tolerance for bugs, but I also expect accountability and transparency from vendors that get my money. I'm not seeing that here, and it's frustrating.
Adobe should issue a formal statement about this problem immediately. At a minimum, they should advise all Mac customers that frequent freezing has been widely reported with the 10.1 release, and to be prepared to revert to an earlier release if they experience these symptoms.