The below link is to an article from Apple Insider on how to reset a Mac to factory default. It is from 2020, but should be relevant for your older Mac running Catalina.
https://appleinsider.com/articles/20/02/20/how-to-factory-reset-a-macbook-pro-and-when-to-do-it HTH. - Brad - On Jan 5, 2025, at 16:45, Phil Halton <philh...@gmail.com> wrote: I have a MacBook Air from I think it’s 2011 or maybe 2013 that’s running Catalina. I’m reformatting the disc and reinstalling the OS to prepare for giving it away. Problem is there is Macintosh HD and then there’s Macintosh HD data volumes I only erase the Mac HD and I see that there’s still like 100 gig unavailable and I’m assuming that’s part of the Mac HD data volume. So, do I first delete, or erase the Mac HD data volume and then Erase and reformat the Mac HD volume itself? What I’m trying to do is make the full 250 GB available to the new user. This has a 250 GB SSD. Sent from my IPhone -- The following information is important for all members of the Mac Visionaries list. If you have any questions or concerns about the running of this list, or if you feel that a member's post is inappropriate, please contact the owners or moderators directly rather than posting on the list itself. Your Mac Visionaries list moderator is Mark Taylor. You can reach mark at: mk...@ucla.edu and your owner is Cara Quinn - you can reach Cara at caraqu...@caraquinn.com The archives for this list can be searched at: http://www.mail-archive.com/macvisionaries@googlegroups.com/ --- You received this message because you are subscribed to the Google Groups "MacVisionaries" group. To unsubscribe from this group and stop receiving emails from it, send an email to macvisionaries+unsubscr...@googlegroups.com. To view this discussion visit https://groups.google.com/d/msgid/macvisionaries/F056FAA0-FD4B-41ED-B06C-C57F9C9CE992%40gmail.com. -- The following information is important for all members of the Mac Visionaries list. If you have any questions or concerns about the running of this list, or if you feel that a member's post is inappropriate, please contact the owners or moderators directly rather than posting on the list itself. Your Mac Visionaries list moderator is Mark Taylor. You can reach mark at: mk...@ucla.edu and your owner is Cara Quinn - you can reach Cara at caraqu...@caraquinn.com The archives for this list can be searched at: http://www.mail-archive.com/macvisionaries@googlegroups.com/ --- You received this message because you are subscribed to the Google Groups "MacVisionaries" group. To unsubscribe from this group and stop receiving emails from it, send an email to macvisionaries+unsubscr...@googlegroups.com. To view this discussion visit https://groups.google.com/d/msgid/macvisionaries/D9C29B2B-EA71-480D-A207-7E0C1D2365A5%40swbell.net.
