[prawn]

I have been using the Yosemite beta and it has been pretty horrible. Constant visual glitches in Photoshop CS6, crashes with display glitches in Sublime Text and really long pauses anytime I try to save a simple document for the first time. e.g., save a new 100KB JPG in Photoshop? 1 min or more. Save a 100MB+ PSD that's already been saved? Instant.

Would've happily avoided the beta but the only way to screen record directly from an iOS device and the Apple-recommended way to create preview videos for the app store involved Yosemite and iOS8.

[eridius]

I've been using Yosemite since the early betas and it's been great for me. I don't use Photoshop, and I can certainly believe that Adobe might be doing nasty things, but all the apps I do use have been fine.

> really long pauses anytime I try to save a simple document for the first time

Is that actually what's happening, or is it a really long pause when trying to show the open/save dialog? I have a couple of NAS volumes mounted, and if I run an app with a Recent Documents entry that lives on one of the volumes, and the NAS is asleep, then the app will often pause when trying to populate the Recent Documents list. This normally happens during open/save. Previous versions of OS X did it too, though I feel like Yosemite might trigger it a bit more often for some reason.

[prawn]

No, really long time to save after actually hitting the Save button. Something to do with creating a new file maybe?

On Friday when I went to reboot, after coming back up it spun overnight without finishing the boot. That started a process which took three days to get Internet Recovery working, restore from Time Machine and then upgrade to Yosemite and finally ditch that awful beta. Absolute waste of time and when I could least afford it.

The long saving times and visual glitches have disappeared with the full Yosemite by the way. Phew!

[pmjordan]

I've seen this behaviour, too. Could it be worse in Yosemite if you have iCloud Drive enabled? Of course, Apple ought to listen to their own advice of "never do I/O on the main thread" but then they don't bother with sandboxing their own App Store apps, either.

[eridius]

I haven't tried iCloud Drive, though that should not be related as, assuming it works anything like iDisk did, it would keep the drive local and sync changes back and forth, rather than doing direct network loading/saving.

As for I/O, last time I checked, the Recent Documents list is actually being loaded on a background thread, but the main thread is where the UI for it has to be populated. Normally the list would be loaded before the main thread goes to access it, but when the load is blocked by e.g. my NAS waking up, the main thread ends up waiting on a semaphore.

It is rather unfortunate, since nothing I'm doing actually needs to see the recent documents list. And if you're going to say that the main thread should be able to simply indicate that it's still loading, and refresh the list when the load finishes, then I completely agree. But I would not be surprised to find that the relevant code here is many years old, possibly written in C, with no maintainers, and not having been touched in those many years, so there's probably little chance of it being fixed :/

[steveax]

Photoshop CS6? Well that's not surprising. Adobe abandoned that and it isn't even supported on 10.9. Why are you surprised that there are problems on 10.10? You can hardly blame Yosemite for that.

[benbreen]

n=1 of course, but I've been using the beta on a 2013 Macbook Pro for a couple months now with no problems besides Safari crashing more often than usual. No issues with Photoshop and performance generally seems better than Mavericks.

[qqz]

Same here, on a 2012 Air. Performance is great but I've noticed a couple Safari crashes/freezes. Finder crashed once I think. Also had trouble with Dark Mode+Reduce Transparency, but those are just beta issues and since GM1 the only issue has been the weird black corners of the volume popup.

[alantinard]

I wish they would support even older hardware, my 2008 mac mini is just crying for an update.

[jayseeg]

10 year backward compatibility crippled MS. I'm not sure where the line is, but 6 years seems pretty old too.

[subdane]

iOS8 has made my 4S nearly unusable. Wish I had waited to install it.

[gurkendoktor]

At least iOS 8 has fixed a few critical security issues (which is doubly important if you use 2FA anywhere, or iCloud Keychain Sync). 10.9 will still receive a few years worth of security fixes.