I cannot turn my mac pro on unless it is plugged in. It has been shutting off randomly too
It will help us diagnose your problem to know the exact model, size, year built, RAM installed and OS you're running.
Wild guess not knowing the first thing about the history, age or configuration of your machine; bad battery.
You may have to contact Apple for an appointment for a diagnostic test of the computer to
include the MagSafe adapter, battery, MagSafe Board (or DC-in Board) & logic board, etc.
Depending on your location you may have to contact an AASP (Apple authorized service
provider) an independent company who has trained specialists who can test & repair it...
•How to identify MacBook Pro models - Apple Support
In any event...
Good luck & happy computing! 🙂
Reset the SMC and NVRAM
Intel-based Macs: Resetting the System Management Controller (SMC)
Run Apple Hardware test
Also see:
my Mac Pro won't start unless its plugged in
