In this post, you’ll find out what is cache, how to delete cache on a Mac and what is the best application among five cache cleaners for Mac. This clutter contains caches, logs, mail attachments and other junk files that take up space on a Mac. Over time, users store tons of junk files on their Macs, and regular cache cleaning is in order. This it is a result of daily using a Mac. If you are a Mac user, sooner or later you may face the problem that your Mac storage is almost full.