Last month I reported on a confirmed bug with OS X 10.10.3 where a kernel panic may occur when working with large JPEG files. Apparently this bug was limited to certain model iMacs, specifically: Late 2014 Retina 5K iMac 27″, late 2013 21.5″ iMac, and late 2013 27″ iMac.

Apple has released an iMac Graphic Update 1.0 to fix this. https://support.apple.com/kb/DL1808?locale=en_US