I have a Mac Pro (Late 2013) running Mojave OS Version 10.14
When the screensaver comes on, it freezes and the only way I can get it to work is by rebooting with the power button. This has been happening for months, even prior to the Mojave install.
I suggest you use the program created by Etresoft, a frequent contributor. It will provide a snapshot of your system which we can analyze to possibly determine the cause of your problem. Please use copy and paste as screen shots can be hard to read. On the screen with Options, please open Options and check the bottom 2 boxes before running. Click “Share Report” button in the toolbar, select “Copy to Clipboard” and then paste into a reply. This will show what is running on your computer. No personal information is shown.
I highly suggest you reboot your Mac in safe mode. Here’s how.
Use safe mode to isolate issues with your Mac - Apple Support
Allan Eckert Has a great idea, and it is safe to use. You can trust what he said About Etrecheck. I’ve used it. Many here have.
Mac Mojave freezes on screensaver
