How to show all running processes on macOS/OS X?
Solution 1:
Inside Terminal, you can type ps aux
Terminal is available under the utilities folder in the App folder.
Solution 2:
Applications / Utilities > Activity Monitor
Solution 3:
You can use top -o mem inside terminal, to see running processes
Solution 4:
The app /Applications/Utilities/Activity Monitor is what you're looking for. If you use the command line in Terminal, the top command is useful too. In Terminal, type man top to see the various options. Activity Monitor shows you a wealth of information about each process.