Today I was looking for some pictures from 2012 and 2013. They were nowhere to be found in my iPhotos. I couldn’t figure out what was going on, but I googled missing photos on Mac and I found out that some people have experienced lost photos when they’ve updated operating systems. I have dozens and dozens of photos from those two years that have just disappeared. WTAF?!? This is horrible.
Unless you deleted them in an iCloud mistake they're probably not totally gone. This happened to me before with photos of that era. I wish I could exactly walk you through what to do, but it's been a while. In an update somewhere along the way there were actually multiple libraries created in my case. I was able to merge them back together
Always make sure you have a backup, too! Time Machine makes it easy.
@BE yeah, ill@go back through my backups and hopefully find them, but goddamn what a pain