Mac Pro Early 2009 (MacPro4,1)

[jay (support)]

Has anyone else tried Yosemite on this particular Mac model? This is my development Mac (20GB of memory, 2.66 GHz quad core Zeon), and Yosemite performance is amazingly, horrendously bad. I've tried several times (each dot release) to make the permanent switch, but every time the performance drives me back to Mavericks. Symptoms are: jumpy mouse movement, out typing the system, TONS of spinning beachballs, horrible app switch times (multiple seconds at least), etc.

I know it's a 6 year old Mac, but the performance difference between Mavericks and Yosemite is incredibly noticeable and what's surprising to me. Yosemite is basically unusable. I'm wondering if maybe there's something else going on with it, particularly if anyone else is is running Yosemite with no issues...

[jay (support)]

Just found this thread on Apple's support forums: I have 3 monitors (on 2 video cards). After reading through that thread to the end, I suspect that's the problem.

Thanks, Apple, for continuing your high-quality OS releases...

20MB of memory?

Seems like Yosemite would be a big ask. I haven't gone to Yosemite on anything yet. My server is a (mid?) 2010 iMac with Mavericks and 8GB RAM.

Dave

[jay (support)]

LOL - fixed that typo...

This does not especially help you a bunch, but I just upgraded my main/development Mac to Yosemite three or so weeks ago and have been pleasantly surprised. It is a bit beefier than your system, though, so not a great compare; still, just wanted to chime in that as a dev system it has been good for me. If it does help since you mentioned graphics cards, I am running dual GTX 680's with three monitors just fine (I didn't double check but I THINK the 680 would run on a 2009 model).

I have Yosemite on macpro 2008. The general performance is ok. The only issue I have is that opening the application folder might take minute. I suspect is is related to spotlight being in a bad state. Sometimes it works for an hour and then it is back to 1 minute. The mac has 28gb ram and 1 tb ssd PCI had disk from old world computing. They claim trim not need with twit setup


Sent from my iPhone using Tapatalk

Yosemite 10.10.4 now supports Trim on 3rd party SSD's - see Mac OS X 10.10.4 Supports TRIM for Third-Party SSD Hard Drives

I have now enabled it on my 2009 & 2010 Mac minis

Another possible cause could be flaky RAM. Yosemite is more aggressive about using available RAM for caches, etc, compared to earlier releases. This could be causing your system to stall much more frequently than before. Not sure if something would show in Console...

Craig

It was a disaster on my 2008 MacBook Pro.