Deleting Old User ID off my Mac mini 2018 HD

I have a 2018 Mac mini. I’ve “retired” the user ID on the Harddrive, after I’ve made an external StartUp Drive on an SSD. It’s working well, running Sonoma 14.8.1.


Can I delete my old user ID, the one on my Harddrive? If so, how? I could use the space on my HD and if it isn’t being accessed at all by the iOS, there’s no reason to keep my old user ID, correct? 

Posted on Dec 29, 2025 1:40 PM

Reply
4 replies

Dec 29, 2025 2:37 PM in response to Stephen Altobello1

As I understand your question, you created an external startup drive, it's working well, and now you want to repurpose the internal drive — formerly used as the Mini's startup device — for either general storage or other purposes because you do not intend to use it as a startup drive ever again.


Yes you can do that, but having rephrased the question in that manner might cause you to reconsider that action.


Use Disk Utility to erase the Mini's internal storage.

Deleting Old User ID off my Mac mini 2018 HD

Welcome to Apple Support Community
A forum where Apple customers help each other with their products. Get started with your Apple Account.