I have followed an online instruction to what I thought was to revert my old iMac to apple start up only to find every thing has been erased now when I try to boot it up I just a flashing ? symbol how can I get past this and try to start over
Hi every one tried reinstalling Mac OS Siera in safe mode but get the following answer,
Would this cable suite my Mac thunderbolt 4 the end marked 10GB I have an external hd and was thinking of backing from my new iMac and reinstalling on my old Mac
every thing I must have done some thing ie not followed the instructions precisely and ended up in the predicament I find myself in.
Just to make things as clear as possible, you cannot do what you propose in the above quote. You can transfer user data in that way but not the Operating System. For that ,you need a macOS Installer application first.I would like download from my new iMac to the ext hd and then install it on my old Mac.
glad to hear there are still good, patient Apple agents willing to spend the necessary time to assist.