It was past midnight and my Mac threw a box I had not seen in years.
Your system has run out of application memory.
Force Quit Applications.
I had four things open. A browser, an editor, a terminal, and a music app that uses about nothing. None of that should fill 36 gigabytes of RAM and then push into swap until the kernel begs you to start closing things.
You have seen this popup. You closed the browser, you closed the editor, you felt a little betrayed by your own machine, and you got maybe twenty minutes before it came back.
