

If the graph gets too high, it will turn yellow and then red, indicating that you have some memory problems and should look into cutting back on some unnecessary or background apps. As long as that graph stays green, you should be in the clear.

However, swap used doesn’t always mean something is wrong. It tends to become higher if you have a lot of apps or tabs open at once or are trying to manage other complex processes. Swap memory is more likely to be used when your current memory isn’t enough to efficiently handle all the tasks you are trying to do on MacOS. Traditionally, swap used has a bad reputation since it can indicate RAM problems.

The operating system does this by borrowing some space from somewhere else - the startup disk, in this case - and using it to temporarily store some data while the RAM is busy handling other tasks.

Swap memory is a type of memory that computers use to offload demands on the current RAM.
