For instance, if your MacBook was released in 2014, don’t expect it to run any OS released prior of that time, because older Apple OS versions simply do not include hardware drivers for your Mac.
If you have a newer Mac, there is no physical option to install Mac OS versions older than your current Mac model.Shut down your Mac, turn it on while holding down Command+R. RELATED: 8 Mac System Features You Can Access in Recovery Mode Your Mac’s Recovery Mode is a treasure trove of useful tools, and it’s the easiest way to wipe your computer and start from scratch. Step One: Boot From Recovery Mode, or an Installer.Chances are, your Mac can run macOS Catalina. Perhaps you are relying on software you have discovered doesn't work properly in the newest version of macOS. There are a few reasons why you might want to install an old version of macOS or Mac OS X. Step 4: Figure out which CAC (ID Card) you have (You need to know this information for step 6). Step 3a: Click the Apple Icon in the upper left corner of your desktop and select 'About This Mac' Step 3b: Look below Mac OS X for: Example: Version 10.X.X.
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