Become a MacRumors Supporter for $50/year with no ads, ability to filter front page stories, and private forums.

smithrh

macrumors 68030
Original poster
Feb 28, 2009
2,747
1,792
For some reason, I couldn't search effectively on these terms, so I decided to back up and load 10.10.3.

Well, Preview is indeed better, but still un-usable. On a scale from 0-100, it goes from 3 to 7. It opens my file (PDF) better, but as soon as I zoom in, one of the cores goes to 100% CPU usage, and stays there, making any subsequent re-sizes or moves incredibly difficult.

Yes, I filed a bug report on this, and I even gave them the file for a benchmark. There's nothing wrong with the file, it behaved perfectly in Preview pre-Yosemite.

Oh well.
 
just checked, and both of these things are working fine here, so something specific to your setups... (am running 10.10.3...).
 
For some reason, I couldn't search effectively on these terms, so I decided to back up and load 10.10.3.

Well, Preview is indeed better, but still un-usable. On a scale from 0-100, it goes from 3 to 7. It opens my file (PDF) better, but as soon as I zoom in, one of the cores goes to 100% CPU usage, and stays there, making any subsequent re-sizes or moves incredibly difficult.

Yes, I filed a bug report on this, and I even gave them the file for a benchmark. There's nothing wrong with the file, it behaved perfectly in Preview pre-Yosemite.

Oh well.

What model of Mac are you running 10.10.3 on?
 
I have a large variety of them, save a Mac Pro.

It's not a model-specific issue.

The reason I ask is because I have Yosemite installed on 3 Mac Computer, 2011 iMac, 2009 MacBook Pro and 2009 Mac-Mini and have not experienced any issues with Preview. I thought maybe it is related to retina display Macs.
 
Preview performance is definitely worse in OS X Yosemite. I've noticed that as well on my 27-inch iMac (Core i7 3.5 GHz, NVIDIA GeForce GTX 780M). It's definitely not the hardware...
 
Register on MacRumors! This sidebar will go away, and you'll see fewer ads.