I also read many pages describing similar problems but didn't found any real solutions. 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: Please follow iClarified on Twitter, Facebook, Google+, or RSS for more Apple news, tutorials, and videos.Buying used mac mini 2018 I decided to do a clean system install to be sure that it is clean. You'll be presented with a list of bootable drives. You may now restart your Mac and hold down the Option key after hearing the boot sound. If prompted to allow Terminal to access your removable device, click OK.Īfter about 30 minutes the creation of your USB Install Key for macOS Big Sur will be complete. You will be asked to enter your Administrative account password. Sudo '/Applications/Install macOS Big Sur.app/Contents/Resources/createinstallmedia' -volume '/Volumes/Untitled' Please note this will erase the entire USB key. Once you've verified that you have the full installer, launch Terminal from the Applications:Utilities folder.Įxecute the following command in the Terminal window replacing 'Untitled' with the name of your USB key. If it's tiny (~20MB), you can either run it to install macOS Big Sur and then redownload the installer, or delete it, upgrade to the latest version of Catalina from the Mac App Store, then redownload the installer. If it's over 10GB, skip to the next step.

Press Command+i on the keyboard and verify its size. Open your Applications folder and select the 'Install macOS Big Sur' app. Once the installer launches, press the Command+Q keys on the keyboard to exit.

You may be brought to a Software Update window, click Upgrade Now or Download to begin downloading the update. Navigate to the macOS Big Sur application page and click the Get button.

Install big sur from usb