By the way, all files will be gone after install.
If you want an even older version of macOS take a look at our article about getting old versions of macOS and Mac OS X. If you have a lot of machines to update or simply prefer a fresh install instead of an in-place upgrade, you should create a reusable macOS Sierra USB drive. I hope you can help me, i’m trying to upgrade imac 27 with SierraOS to High Sierra, following your instructions in two different wayġ – downloaded 5 macOS_High_Sierra.rar files on the imac into the same folderģ – unizp .10.13.6.part1.rar with winzip but it doesn’t work, it doesn’t ask me the password but instead it creates another .10.13.6.part1.rar file…ġ – downloaded 5 macOS_High_Sierra.rar file on a windows pc into the same folderģ – unizp .10.13.6.part1.rar with winzip, it asks for the password and after i get a file .10.13.6.dmg about 5.3GBĤ – copy with external HD file .10.13.6.dmg on the imac and run it, it contains 2 file: donotreadme.html and .10.13.6ĥ – i run .10.13.6 file after modified ” security and privacy ” policy to allow to open file from unidentified developerĦ – Verifying ” install macOS Higs Sierra ” program starts but doesn’t complete…. Create the bootable Windows 10 installer USB drive using the Mac OS Xs built-in Boot Camp Assistant (BCA). &0183 &32 Before Mojave was macOS High Sierra.
