Solves the memory problem!
I have a 2014 Mac mini so, sadly, memory is not upgradable for me. I’ve run into numerous issues with running out of memory and this little app really helps. It has a very small footprint and resides up there on the upper right of your home screen with the calendar, sound and keyboard icons. A click of the button on the drop-down menu optimizes the memory immediately by closing out caches. After being online, I can easily get 40-50% back of my memory usage, which is substantial. Another button allows you to clean up junk and temp files (customizable from Preferences).
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Dr. Cleaner: Disk, Mem Clean, v3.0.0