![]() Use Utilities > Disk Utiities and point it to the Top Most internal drive name ( Like Apple SSD xxxx ). Restart and immediately press Option key. Back out of Utilities and launch Install Big Sur Applications/Install\ macOS\ Big\ Sur.app Sudo /Applications/Install\ macOS\ Big\ Sur.app/Contents/Resources/createinstallmedia -volume /Volumes/Untitled. Have 16 GB USB drive attached, Format as HFS ( Journaled ) and GUID Partition. Run a TM Backup and also a Bootable Clone or two to each there own External Drive. Copy this to a good external drive for safe keeping. In Applications folder will be a New App Install Big Sur. Install macOS Big Sur to an internal drive volume.One can do this via Internet Recovery ( not suggested ) OR and Better is download the Full Big Sur on a compatible computer and stop there. "/Volumes/Install macOS Big Sur/Install macOS Big Sur.app/Contents/MacOS/InstallAssistant_springboard" If you have not already done so, plug in the USB flash drive Big Sur installer.Įnter the command below to launch the Install macOS Big Sur application from the USB flash drive. This will open a Terminal application window. Select Utilities→Terminal from the menu bar. If necessary, use the Disk Utility to erase the internal drive. ![]() Proceed until you reach the image shown below. When Recovery Assistant window appears, select one of the following options.Ĭhoose Recovery Assistant→Erase Mac… from the menu bar. In other words, start or restart the Mac mini and immediately hold down the Option Command R key combination until the spinning globe appears. See the Apple website How to create a bootable installer for macOS.īoot to Big Sur Internet Recovery. Use your Mac or another Mac to create the USB flash drive Big Sur installer. Is this disk erased enough to creat new volume and proceed with the installation?īelow are the steps to install Big Sur from a flash drive when the Startup Security Utility disallows booting from external media. I don't know if there are any options left than sending it to Apple repair :( Doing Shift-Option-Command-R fails with some error like 1008f or 2008f at the globe stage beginning the process. Installing Catalina from USB fails at the beginning with error 1008f. Installing Bur Sur from USB fails (I think the same way as when installing from internet but fails). ![]() Next, you’ll need to create a bootable USB installer (involves another external drive). Then, you’ll need to download macOS Big Sur package to your Applications. The first step is to clean and back up your Mac to some external source. I also read many pages describing similar problems but didn't found any real solutions. Basic steps to clean install macOS Big Sur. I'm using an Ethernet connection and the Internet connection is quite good (I event connected directly to the modem to bypass the router to be sure that no built in firewall causes the failure) and I tried on different hours for the past 3 days. And talking about logs I managed to copy them so if anyone can read something useful from them and recommend any action that could solve the issue - here they are: Of course I've tried not once not twice, always ends with the same message and in a similar way when checking the logs. You can try again to complete the installation. Command-R failed with some 2008F error or something so after some reading and thinking I used Option-Command-R which should install the latest OS available and compatible and that installs Bug Sur.įirst it says I will have to wait for some 40 min for the process to finish and everything seems to go fine, but then around 11 mins before the end some problems start and the installation is cancelled with a human error saying: An error occurred installing macOS. Then I followed the reinstallation procedure: I followed the steps from the Apple docs: Buying used mac mini 2018 I decided to do a clean system install to be sure that it is clean.
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