Feb 11, 2012 Applications - Utilities - Activity Monitor - Disk Usage. I'm assuming you mean how much hard-drive space do you have left. If you mean how much memory (RAM) is installed then Apple menu (top left on menu bar) - 'About this Mac' will tell you. Aug 27, 2019 This is located at the bottom of your Activity Monitor screen. It actually has an indication such as: Once that the memory pressure graph is in color green, then that means you still have more memory. Is the memory graph is in color yellow, that means your Mac is beginning to use more of your memory. To do this, click the Apple menu and choose About This Mac; then click the More Info button. In the window that appears, click the Memory toolbar button. Here you can see exactly how many memory modules you have, what type they are, and how much memory each provides.
Activity Monitor User Guide
Mac Memory Cleaner
You can see the amount of system memory being used on your Mac.
In the Activity Monitor app on your Mac, click Memory (or use the Touch Bar) to see the following in the bottom of the window:
Memory Pressure: Graphically represents how efficiently your memory is serving your processing needs.
Memory pressure is determined by the amount of free memory, swap rate, wired memory, and file cached memory.
Physical Memory: The amount of RAM installed.
Memory Used: The amount of RAM being used. To the right, you can see where the memory is allocated.
App Memory: The amount of memory being used by apps.
Wired Memory: Memory required by the system to operate. This memory can’t be cached and must stay in RAM, so it’s not available to other apps.
Compressed: The amount of memory that has been compressed to make more RAM available.
When your computer approaches its maximum memory capacity, inactive apps in memory are compressed, making more memory available to active apps. Look in the Compressed Mem column for each app to see the amount of memory being compressed for that app.
Cached Files: The size of files cached by the system into unused memory to improve performance.
Until this memory is overwritten, it remains cached, so it can help improve performance when you reopen the app.
Swap Used: The amount of space being used on your startup disk to swap unused files to and from RAM.
To display more columns, choose View > Columns, then choose the columns you want to show.
Find Memory For Macbook
You can use Activity Monitor to determine if your Mac could use more RAM.