Delete system junk, unwanted apps and malware, and tune your. ^_^ Other than that, it seems to be great. The most user-friendly problem fixer for Mac. So… Yeah, if the devs read this, I request that they avoid having that window show as the computer’s shutting down. It seemed like it was slowing the shutdown process, too. Mac OS X El Capitan 10.11 or later: Speed up Mac in one-click, Remove unwanted add-ons, Clear logs, cache, & cookies: Available: 8.7: Daisy Disk: Mac OS X Yosemite 10.10 or later: Recover disk space on Mac, Drag and drop funtionality, Lightning-fast scanning speed: Available: 8.7: AVG Cleaner: Mac OS X Yosemite 10. I’m not entirely sure when it’s designed to show up, but I know that it DID show up when I told the computer to shut down: it ended up showing on a black screen, with this weird, unexpected smile, as I was sitting in the dark. The one complaint has less to do with the function of the app itself, and more to do with the rating-request screen. =) Overall, this app seems straightforward and easy-to-use, while still having a good amount of options. I also tried the memory cleaning, and it seems to work well. Sure enough, I could actually SEE how the app took up more and more memory - and how it’s self-cleaning was lacking - by watching the memory chart. I grabbed this app when I suspected that another little app had a memory-inefficient process, making it hog up all the free RAM despite being so simple.