![]() Testing conducted by Apple in April and May 2023 using pre-production 15‑inch MacBook Air systems with Apple M2, 8‑core CPU, 10‑core GPU, 8GB of RAM and 256GB SSD. Battery life varies by use and configuration. ![]() The Apple TV app movie playback test measures battery life by playing back HD 1080p content with display brightness set to 8 clicks from bottom. Testing conducted by Apple in October 2020 using pre-production MacBook Air systems with Apple M1 chip and 8‑core GPU, configured with 8GB of RAM and 512GB SSD. When measured as a standard rectangular shape, the screens are 13.6 inches, 15.3 inches, 14.2 inches and 16.2 inches diagonally (actual viewable area is less). The displays on the 13‑inch and 15‑inch MacBook Air with M2 and the 14‑inch and 16‑inch MacBook Pro have rounded corners at the top. Handoff requires an iPhone or iPad with iOS 8 or later or iPadOS. iPhone calls require an iPhone with iOS 8 or later. SMS requires an iPhone or iPad with iOS 8.1 or later or iPadOS. 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.Software and content may be sold separately. 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. For example, "Install macOS High Sierra.app" would become Install\ macOS\ High\ Sierra.app 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. This assumes that you're installing Big Sur, that your drive is labeled "macos_installer," and that you have the relevant macOS installer in your Applications folder: sudo /Applications/ Install\ macOS\ Big\ Sur.app/ Contents/Resources/createinstallmedia -volume /Volumes/macos_installer You can use a single command to create your installation medium, but this differs depending on which version of macOS you're trying to install. We'll be using Terminal to create the USB drive, so launch it via Spotlight or locate the app in your Applications > Utilities folder. We'd recommend test-driving any experimental macOS installations for a while before you commit. As a last resort, you could manually back up your important documents, libraries, and so on to an external drive. You can get around this by using a third-party backup tool like Carbon Copy Cloner or ChronoSync. For example, trying to restore a Time Machine backup made in Big Sur (released in 2020) in macOS Catalina (released in 2019) could prove difficult. Older versions of macOS might experience problems restoring from Time Machine backups made on subsequent releases. If you do decide to try a new version of macOS and you're reliant on Time Machine for your backups, resist backing up with Time Machine until you're sure that it's where you want to stay. This guide can help you roll back to almost any version of macOS. After trying this, you might come to the conclusion that newer releases perform too poorly on your hardware, at which point, you'll need to roll back. If you're willing, you can install newer versions of macOS than your Mac supports with tools like Patched Sur. ![]() 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. 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. It's important to understand that not all versions of macOS (or Mac OS X) work with all hardware configurations. While the process is pretty straightforward, getting your hands on older releases of macOS isn't so easy. ![]()
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