If you want to get the job done yourself and make some more permanent changes to your RAM usage, use Activity Monitor. The only downside is that once you start doing other things on your Mac again, RAM usage goes back up. It takes a few seconds longer to work, but after one run-through I can already begin to hear my MacBook’s fan slowing down. I also recommend the $4.99 paid upgrade for “Extreme Clean” which tends to clean anywhere from 400MB to 700MB for me. You can always just keep cleaning Clean after each cycle until it frees up the amount you want, though with each click the amount it can clean gets smaller. The app is free and on average I manage to clean 100MB to 300MB every time I use it. With the click of a button, Memory Clean digs around for areas behind the scenes where it can free up memory and does just that. The app shows you a breakdown of how your Mac is using up RAM and how much is available. You won’t lose any data or anything like that. Memory Clean sounds exactly like what it does, it cleans your memory. With the click of a button, Memory Clean digs around for areas behind the scenes where it can free up memory. So I looked for an easy solution and found one in the Mac App Store: Memory Clean 2. Upon inspecting what could be the cause, I found that at any given time I only had 100MB to 500MB of available RAM. My once almost consistently quiet MacBook Air now has the fan spinning even when I only have a browser window and Messages open. What you can do instead, to somewhat remedy the issue, is use software tools to free up some RAM.

How to free up memory macbook