I've even heard of success stories involving making the USB media then burning the partition itself to a double-layer DVD disc - and thus having a bootable optical disc version for your older Macs.

Wait until a new window pops up informing you your bootable installer has been created and is ready to use. Once complete, eject the USB drive and put it away for safekeeping.

Having an independent bootable USB drive or SD Card also makes sense in case you want to install Mountain Lion on multiple computers without having to download it time and again.

This tutorial shows you how to create a bootable macOS Big Sur USB installer drive, which can be handy for performing fresh installs on your Mac.

Once the process is finished, you’ll have a working macOS High Sierra bootable USB install disk that can be used to install macOS High Sierra beta on any Mac that supports it.

Step-by-step guide explaining how to make a bootable OS X El Capitan beta USB installer drive.

Has anyone tried dragging the “Install OS X Mavericks” App from the bootable USB Flash Drive w/ Recovery Partition, as outlined by TyWebb, back to the Mac’s Applications folder?

If you have more than one Mac you want to upgrade to macOS 10.15 Catalina but don't want to waste so much bandwidth downloading it for each machine, one option is to create a bootable installer on ...