Ran into this issue today –
First, I tried :
Search for and open “Activity Monitor” then close all of the Adobe applications in Activity Monitor.
Search for and open “Finder” , click on Go tab and select > Go to Folder.
Location 1: In the box type ~/Library/Application Support.
Location 2: In the box type ~/Library/Preferences.
Location 3: Documents folder
Renamed the ‘Adobe‘ folders to ‘OldAdobe‘
Launch Premiere Pro, accept the License Agreement and see if it works.
Note: You will lose your customized workspaces and keyboard shortcuts.
This didn’t work for me 🙁 but doing the following did 🙂
Open finder > Go tab > Go to Folder
Type “~/Library” and click Go.
Go to /Library/Caches/Adobe/Premiere Pro/12.0
Delete the “Typesupport” folder
Then Premiere opened and stayed open and loaded.