The reason you want to restore El Capitan to the MBP is to have another backup in case something goes wrong in migrating to your new Mini.Įven if you need to sell your MBP before you can migrate to your new Mini, I would still restore the El Capitan Time Machine to the MBP and then make another backup of that configuration.

I think you said that still works - is that correct? If you do that successfully, you can try the migration from the Time Machine backup on your new Mini.

If you can wait to do the migration to your new Mini, should restore your El Capitan Time Machine backup to your MBP. The question is do you want to sell your MBP before you can migrate to your new Mini or can you wait until you have been able to migrate to your new Mini? There may be problems in migrating apps because you're going from El Capitan to Mojave, but Migration Assistant does try to determine if there will be problems and will not migrate an app if it thinks there will be a problem. Have you tried to migrate your data from your MBP to your new Mini yet? With the Migration Assistant app, you can migrate from the El Capitan Time Machine backup on your new Mini. If you're selling your computer, you don't have to do that, you just need to make sure it can work with a new install of Mojave (or High Sierra). You are trying to make your updated El Capitan -> Mojave work. You can ask it to produce a software for posting and it will remove specific information about your computer (serial #, etc.) It's free, but they have a pay version and the free version has a limitation on the times you can run it. To check what 3rd-party background software you have on your computer, you can use EtreCheck: According to one source, the latest version for the MacBook Pro 12,1 should be 184.0.0.0.0 (if it's slightly off, that shouldn't matter for being able to run Mojave). On the 'Hardware Overview' screen, look for 'Boot ROM Version'. If it doesn't appear, click on the 'Hardware' line which is the first line at the top left. The first screen that appears should say 'Hardware Overview'. In any case, if you can restore properly, you can check the BootROM version by running the 'System Information' app. Now if you installed by cloning (it doesn't appear that's the case here), that may be an issue. If it couldn't install the necessary firmware, I think it should have warned about that and stopped the installation (other people have come across that issue). The Mojave installer would have attempted to install the required the necessary EFI/BootROM firmware and as you got to the logon screen, it probably did.

Upgrade to mojave from el capitan