Mac Tips: How to repair the Photos library in Mac OS X Yosemite

Photos is Apple's photo-management app that recently replaced iPhoto with the release of OS X Yosemite 10.10.3. It certainly gets the job done, but it can still be prone to errors once in a while. If you're experiencing a crashing app at launch, failed imports, or missing thumbnails or photos, then you may want to try repairing your Photos library to recover from these issues. Before performing a repair, it's best to make a backup of your library via Time Machine or by manually copying it to ano