Both will optimize your RAM to maximize available memory, while Dr. Noticed how some applications consume so much RAM your Mac moves like a geriatric possum? One way to fix this is to relaunch the memory-consuming app, the other is to use Memory Clean or Dr. DiskWarrior is an insanely powerful recovery solution, but for basic file recovery all three work, including recovery of data from external drives.

When things go wrong and you accidentally delete data or your hard drive fails then you’ll need Disk Drill, Data Rescue or DiskWarrior ( $119).