What happens if I reinstall Mac os
What happens if I reinstall Mac os
Mac Pro
What happens if I reinstall Mac os
Mac Pro
You'll have new system files for whatever system you're reinstalling.
As far as your user data it depends on how you reinstall the system.
Please read the following user tip and restate your question/problem in detail:
Writing an Effective Apple Support Communities Question - Apple Community
What happens if I reinstall Mac os