Apple decided to kill off the startup chime from the new model of MacBook Pro, which aside from being a mainstay on Macs for years, has also always helped troubleshoot boot issues. Thankfully, you can get the sound back with a Terminal command.
Time Machine is a great service for backing up your computer, and by default it doesn’t use much CPU power to do it. That’s great most of the time, but sometimes you need to get stuff backed up as soon as possible. Defaults-Write points out the Terminal command for doing…