5/18/2023 0 Comments Install macos sierra from usb![]() No question at all about needing an internet connection.Īs far as the "method" - I have used 4 different methods. No argument at all, it began installing on a blank partition that I had ready for that. I did just test this by booting to my High Sierra installer partition, with my router turned off. If yours is significantly less than 5GB, then you need to try downloading High Sierra from the App Store (again) The full installer app for High Sierra (10.3.4) is more than 5.2GB. I don't know how to determine which installer you get, but you can easily check that the size is correct. That would definitely require an internet connection to run. It runs, but downloads virtually everything. Most refer to that as a "stub" installer. Click to expand.I suspect that you have an installer that simply has the base install.
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