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So if I have MacOS Yosimite, and I'm trying to create a bootable USB drive with MacOS High Sierra for a computer component upgrade, the MacOS High Sierra installer I download will not work unless I upgrade to MacOS Sierra first?
MacBook Pro 13″, OS X 10.10
You must be getting a 10.13 update not the whole installer.
Don't use FireFox for this link…
https://itunes.apple.com/app/macos-high-sierra/id1246284741?mt=12
If you get a corrupted message...
Naw, not damaged, it's just that you have an old copy already in Applications, there are 2 cures...
Disconnect from the Internet & set the Date back to 2014, then you can run the Install MacsOS High Sierra App in Applications, so expired Certificates are not expired.
Or... trash the Install MacsOS High Sierra.app in Applications then a new copy more recent version can be downloaded.
You must be getting a 10.13 update not the whole installer.
Don't use FireFox for this link…
https://itunes.apple.com/app/macos-high-sierra/id1246284741?mt=12
If you get a corrupted message...
Naw, not damaged, it's just that you have an old copy already in Applications, there are 2 cures...
Disconnect from the Internet & set the Date back to 2014, then you can run the Install MacsOS High Sierra App in Applications, so expired Certificates are not expired.
Or... trash the Install MacsOS High Sierra.app in Applications then a new copy more recent version can be downloaded.
Any luck yet?
Bootable USB drive for MacOS High Sierra for old MacBook Pro
