I have no rational explanation why I never got around to installing a system-flushing program like CCleaner (there are many that offer the same basic service), but for whatever idiotic reason I never did. But recently all three units (2 Macbook Pros with solid-state drives, a Macbook Air) began acting all slow and gummy and covered in maple syrup, and I was getting really sick of this. So I complained to Stan’s Tech Garage, and they installed CCleaner on all three, and now things are much faster. I’ll be running the system check every two weeks — easy.