The 2007 iMac 7,1 is compatible if the CPU is upgraded to a Penryn-based Core 2 Duo, such as a T9300. Machines that ARE NOT supported: 2006-2007 Mac Pros, iMacs, MacBook Pros, and Mac Minis: MacPro1,1 MacPro2,1 iMac4,1 iMac5,x iMac6,1 iMac7,1 MacBookPro1,1 MacBookPro2,1 MacBookPro3,1 Macmini1,1 Macmini2,1 Macmini5,x (systems with AMD Radeon HD 6xxx series GPUs will be almost unusable when running Catalina.).Late-2008 or newer MacBook Air or Aluminum Unibody MacBook:Įarly-2009 or newer Mac Mini or white MacBook: iMac12,x (systems with AMD Radeon HD 5xxx and 6xxx series GPUs will be almost unusable when running Catalina.).iMac11,x (systems with AMD Radeon HD 5xxx and 6xxx series GPUs will be almost unusable when running Catalina.).System Compatibility Early-2008 or newer Mac Pro, iMac, or MacBook Pro: When installing, ensure your system is plugged in to power, or the update will not be installed. If you have NOT previously installed High Sierra, you can download and install this package to install the latest BootROM version. Important InfoĪPFS BootROM Support: If you have a machine that supports High Sierra natively, you MUST ensure you have the latest version of the system's BootROM installed. Do not attempt to install macOS Catalina on computers that are in the Not Supported list. Also consider creating a Time Machine backup before proceeding with an installation and look through System Compatibility section. MacUpdate team strongly suggests not to install macOS Catalina if you only have one computer or if it is your main machine. It can help you create a bootable USB drive that can be used to install macOS Catalina on Mac computers older than mid 2012. Open that app from your Applications folder to begin installing the operating system.MacOS Catalina Patcher lets you install macOS Catalina on Mac computers that are no longer officially supported. Safari downloads the following older installers as a disk image named InstallOS.dmg or InstallMacOSX.dmg. macOS High Sierra can upgrade Sierra, El Capitan, Yosemite, Mavericks, Mountain Lion.macOS Mojave can upgrade High Sierra, Sierra, El Capitan, Yosemite, Mavericks, Mountain Lion.

macOS Catalina can upgrade Mojave, High Sierra, Sierra, El Capitan, Yosemite, Mavericks.

macOS Big Sur can upgrade Catalina, Mojave, High Sierra, Sierra, El Capitan, Yosemite, Mavericks.

After you download the installer from the App Store, the installer opens automatically. Safari uses these links to find the old installers in the App Store.

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