To ensure that everything goes smoothly, we'll take the extra step of deleting your existing partition before installing macOS. Once your installation files have been copied, it's time to install macOS from scratch. Once you hit Enter, you'll need to enter your admin password to approve the command, and then hit "Y" on your keyboard to confirm that you're OK with the contents of the USB drive being overwritten. Here's another example that creates a macOS High Sierra install USB on a drive named "MacOS Installer": sudo /Applications/ Install\ macOS\ High\ Sierra.app/ Contents/Resources/createinstallmedia -volume /Volumes/MacOS\ InstallerĬommand to list all connected volumes, which will include your USB installation medium in case you need to check the label. While requiring more disk space, this has the highest performance and the easiest means to copy files between the two different OSes and developer environments. For example, "Install macOS High Sierra.app" would become Install\ macOS\ High\ Sierra.app Assuming you have sufficient space on your disk, you could try partitioning it into two separate volumes from Disk Utility, then installing macOS Catalina onto the second partition. Be aware that any spaces will need to be preceded by a backslash. You can change various parts of this command to suit your own circumstances, with the main one being the name of the installer. Sudo /Applications/ Install\ macOS\ Big\ Sur.app/ Contents/Resources/createinstallmedia -volume /Volumes/macos_installer You can find out which Mac you have by clicking on the Apple logo in the top-left corner and selecting "About This Mac" to see the name and year of release. If you're not sure what your Mac came with, head to Apple Support and search for your exact model. Your Mac's "earliest" supported version of macOS is the one that it came with. Older versions were written for Intel chips, which use the x86_64 instruction set, while the newer Apple Silicon chips use the ARM instruction set. Fixes an issue that could prevent files syncing through iCloud Drive. Resolves an issue where macOS would not automatically connect to Wi-Fi networks. It's common knowledge that new macOS releases often drop support for older hardware, but the same is true for newer Mac models and older software, too.įor example, you cannot install any version of macOS prior to Big Sur (released in 2020) on a Mac with an Apple Silicon chip, including the M1. macOS Catalina 10.15.7 provides important security updates and bug fixes for your Mac. Safari 14 improves the browser’s tabs, adds a new. It's important to understand that not all versions of macOS (or Mac OS X) work with all hardware configurations. Apple has released the latest version of its Safari browser for macOS Catalina and High Sierra, ahead of the release of Big Sur later this year. While the process is pretty straightforward, getting your hands on older releases of macOS isn't so easy.
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