My poor Mac stopped working a week ago. Given that the Mac is my primary writing computer, this is a worry just before NaNoWriMo.
The local repair shop found that the hard drive had died. So they replaced the drive and installed the base IOS.
Fortunately, I was using Time Machine to back up the Mac. So it's nearly back to normal.
Without the Mac, NaNo would be much harder. This is not an excuse now.