![]() If downgrading to a previous version of the operating system worked as expected, and you feel that it is something you could repeat in the future, then it is recommended to save a copy of this version on a spare driveto speed up the process. Follow the rest of the prompts to finish the installation. When you are sure of your decision, click “Delete” and confirm.įinally, exit Disk Utility and select “Reinstall macOS” or “Install macOS” (or Mac OS X, for earlier versions) from the macOS Utilities window. Otherwise, you will need to format to “Mac OS Extended (Journaled)” for El Capitan and earlier**. If you are installing macOS Sierra or later, choose “APFS”.Make sure you’ve backed up any data you don’t want to lose. Select your drive, usually labeled as “MacintoshHD” in the sidebar, then click “Delete”.It’s important to note that the contents of your Mac’s system volume will be erased in the next step. The latest version, macOS Monterey 12.5.1, was released on August 17 and contains important security updates that address a serious vulnerability in the Kernel and WebKit, both of which were.A language may need to be selected first. Release when you see a list of startup volumes, select the USB stick created at startup, and click the arrow pointing up. Intel-powered Macs: hold down the Option (Alt) key while turning on your Mac.Apple Silicon (chip M1 and newer): Hold down the power button until you see the boot options window and then right-click on the USB volume created earlier and click Continue.Insert the USB drive and shut down your Mac and follow the instructions that correspond to the type of Mac you have.To make sure everything goes smoothly, we’ll take the extra step of delete your existing partition before installing macOS. Install macOS from scratchOnce the setup files have been copied over, it’s time to install macOS from scratch. ![]() Select the USB memory that you will use as a boot disk and format it.Once you have completed the previous steps, you will be ready to use it as a boot disk.Apple recommends a USB drive formatted as Mac OS Extended, with 14 GB of free space for the latest versions of macOS. You need to create a boot disk (a USB stick) to install an earlier version of macOS. And we must open it from the folder Applications to start installing the operating system. The files needed to install older versions of macOS are downloaded as a disk image called InstallOS.dmg or InstallMacOSX.dmg. OS X Yosemite you can update Mavericks, Mountain Lion, Lion, or Snow Leopard.OS X El Capitanyou can update Yosemite, Mavericks, Mountain Lion, Lion, or Snow Leopard.macOS Sierra you can update El Capitan, Yosemite, Mavericks, Mountain Lion or Lion.macOS High Sierra you can update Sierra, El Capitan, Yosemite, Mavericks and Mountain Lion.macOS Mojave you can update High Sierra, Sierra, El Capitan, Yosemite, Mavericks and Mountain Lion.macOS Catalina can update Mojave, High Sierra, Sierra, El Capitan, Yosemite and Mavericks.macOS Big Sur you can update Catalina, Mojave, High Sierra, Sierra, El Capitan, Yosemite and Mavericks.
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