One week ago, a report surfaced that showed many OS X Yosemite owners were suffering from an unusual situation that was chasing their machines to either freeze or outright restart unexpectedly.
The issue seemed to stem from opening large JPEG images on their machine, whether it was through Apple’s stock Preview or even within Finder. While the specific size for the issue isn’t known, the issue has apparently been verified by Apple as the company has officially released an update for iMacs (2013 or 2014 models) that is meant to alleviate the issue:
If you’re using using OS X Yosemite v10.10.3 and one of the following iMac models, viewing certain very large JPEG (.jpg) images in the Finder or Preview can cause your iMac to briefly stop responding, display a black screen, and restart to a message that your computer restarted because of a problem.
iMac (Retina 5K, 27-inch, Late 2014)
iMac (27-inch, Late 2013)
iMac (21.5-inch, Late 2013)
The iMac Graphics Update 1.0 is available now for the aforementioned iMac models, so those that were affected by it should have something to look forward to now.[via Apple]