TechTool Pro, Micromat Application caches are easily uninstalled or trashed manually, but should probably be limited to instances where an individual application is running slowly or erratically: There is no need to purchase anything until and unless you need to. When you have no large chunks of free contiguous space left, you can expect problems to begin to appear if you don't defragment your drive. Note that if you let this problem advance too far, it may become impossible for any utility to work on your drive, protesting that there isn't enough free space on your drive for it to be able to run. (This despite the fact that you may have many gigabytes of "total" free space left on your drive.) Joe Kissell of Macworld magazine recommends defragmenting your hard drive as it starts becoming too full or when there is severe disk fragmentation. Execute the workon command to access the cv Python virtual environment. YASU is a free program which, among other useful things, cleans out system and Internet browser caches. You can get YASU from: Site:
Sophos Procedures for manually running the maintenance scripts. UFS is UFS. It doesn’t fragment, but it doesn’t have the dual fork support that various apps need. This procedure invokes what Apple calls a "Safe Boot": Macintosh OS X Beachballs! User reviews Update — 15 May 2017: "ACL found but not expected" or “Warning: SUID file” error messages
