You can boot from your USB drive and not have to download the macOS installer again.
#How to reimage mac from usb install#
Now if you find yourself in a sticky situation where your Mac isn't booting, or you want to do a fresh install of macOS, you have a solution. Related: Is Your Mac Running Slow? Simple Tips to Speed It Up This almost always results in a Mac running faster after a clean install, since macOS has started over with a clean slate. Another benefit of using a bootable disk for a macOS installation is that you can perform a clean install.Ī clean install allows you to get rid of junk apps and files that may have accumulated over time. These include regaining access to a Mac that refuses to boot or recover files that seem to be lost.
You can also use the built-in recovery tools that come with the macOS installer to troubleshoot and fix different kinds of issues. This can save quite a bit of time, considering the most versions of macOS have an installer size of 12GB.
#How to reimage mac from usb update#
Why Would You Need to Install macOS From a USB?Ĭreating a bootable USB drive and using it to reinstall to macOS is a bit of a lengthier process as opposed to simply updating macOS from the Software Update section of the System Preferences, but it has its benefits.Ĭreating a bootable USB disk allows you to install or update macOS on multiple systems without having to download the installer on each Mac.
But did you know that you can also create a bootable USB drive to install macOS from? This will let you boot your Mac from a different source if it won't work normally, and makes installs on multiple machines easy. As you may know, you can reinstall macOS on your computer via the internet recovery method.
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