![]() and since yesterday when i reboot(normal start) the mac i have a black screen with a prohibition sign. then "An error occurred preparing the software update" then "An error occurred applying the software update in macos big sur" And since one week i had different error:įirst: "An error occurred while installing the selected updates macos big sur" Since months i have an error while trying to download the update. According to Apple my mac should be ready for the new OS. I'm trying since one week to have a successful installation of macOS Big Sur 11.4 on my Imac late 2015 with Intel i5 processor and 1TB HDD. Image if i loose all my data !!! This will be my last Apple computer and will go back to Windows as they don't have this mountain of issues when they release a "new SAFE OS update". I don't have a TM backup because my external drive, 1TB, is permanently rejected by the mac i don#t know for what reason. To start i'm a music produce since 6 years and i bot my Imac 4 years ago and use it for my production.
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