On my Windows PC at work I use the built-in photo viewer application to open a single photo, crop it, and auto-enhance the brightness/contrast. I can then hit the right and left keys to move to the next photo in the open folder, such that only the currently-selected file is open at any given time. In Preview on the Mac, you have to select all the photos you want to work with and open them all at once. I'm trying to quickly crop and enhance about 100 large photos and Preview is crashing on my Mac running OS X Yosemite 10.10.1. Even cutting my selection down to ten simultaneous photos causes problems with Preview. Can I use Preview to mimic my Windows workflow for super basic photo editing? Is there a better third-party application to achieve this? I should emphasize I'm looking to save time and spend about ten seconds on each photo rather than meticulously work on each one, taking time to close every photo and open the following one. Thanks for your input!