![]() ![]() If your System Preferences doesn't include Software Update, learn how to upgrade to macOS Monterey or upgrade to an older macOS, and use the Updates tab of the App Store app to get app updates. In the System Preferences window, click Software Update.From the Apple menu in the corner of your screen, choose System Preferences. ![]() Then follow these steps to find and install any available software updates or upgrades. It is possible your external drive's controller has an issue or may not be completely compatible with a Mac.Before you get started, it's a good idea to back up your Mac. Make sure to select the external physical drive and not the external drive's container or volumes when erasing it or the cloned drive may not boot since they were made for Mojave. Before cloning, you will need to use Disk Utility to erase the external drive and give it a GUID partition with HFS+ (Journaled) file system. I would suggest making sure your internal & external drives have unique names so as not to confuse yourself or the installer. If you see this new test folder on the Desktop after booting to the clone, then you did not boot to the cloned drive.Īfter verifying the external drive boots, then go to the App Store and download the installer and run it as an app from the external drive. To make sure you are actually booting to the cloned external drive rather than the original internal drive, create a new folder on your Desktop after the cloning process has finished. You can then test to make sure the external drive boots properly. I think your best option is to use Carbon Copy Cloner to clone your internal drive to the external one. Not all USB sticks work well booting a Mac and some (even name brands USB sticks) can even corrupt the data stored on the USB stick. There is a possibility you have an issue with the USB stick containing the installer. It sounds like you may have finally made a Mojave installer. ![]()
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March 2023
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