Same! I tried to push the update as much forward as I could but many programs needed it.. After it everything is lagging and slow, the vent keeps regularly turning on and making a noise like my Macbook Pro is going to explode + everything freezes at that time. Also, some of my shortcuts stopped working eg cmd+c / cmd +v don't work in Finder, spotlight search isn't working anymore for Google Drive (where basically all my files are located), Photoshop barely works.. at first I couldn't even save things, edit windows were blank + some other weird stuff I didn't solve, Indesign crashes while saving large files ...and the list goes on. All those strange errors needed hours to be solved but some things I never did (luckily I can still use my other computer where I didn't make an update to use the programs that don't work). Basically I need to hire myself an IT guy to solve all this! I guess the best way to solve it is just quit using Apple. It's very hard, because I've been a Mac user almost 20 years but post Steve Jobs Apple really doesn't leave any other choice... really sad to see this kind of downfall. As a first step I just changed my phone to android during the last months :(