Why is my macbook crashing?

Question

macOS

If you don’t restart the macbook for a couple of days, leaving the browser open with many tabs, mail and something else plus working actively these days, then the macbook just stops and reboots at one moment - a clear lack of RAM. but I can't figure out why it doesn't use swap? I checked and re-enabled swap in the terminal, but it was enabled, although in the last couple of months I have never seen swap being used. It just reboots and that's it.
macbook 13 late 2013 retina 8gb i5 256gb

Answer 1

There can be about a million reasons: starting from some problematic software that causes a reboot, ending with hardware problems. The first problem can be at least checked by reinstalling the system, with the second one only to be dragged to the service.
Lack of memory has nothing to do with it.

Answer 2

I had the same problem on my mac because of the usb modem

Answer 3

Open the console (Console.app) and see the logs. Most likely the reason will be indicated there.