With Mac OS X Lion and a new piece of free software, it’s easier than ever to create a USB keychain that you can boot from.

How-To How to create a bootable USB macOS installer Make a macOS installer with createinstallmedia and install Sequoia, the latest beta, or any macOS on multiple Macs, or do a clean install.

The OS X 10.10 Yosemite installer from the Mac App Store in your Applications folder. The installer will delete itself when you install the operating system, but it can be re-downloaded if necessary.

Now that Apple has released OS X 10.9 Mavericks, you might want to consider creating a USB install drive for clean installs and future use.

How to create a macOS Monterey USB Install drive for quick and easy installations of Apple's latest operating system for Mac.

Here are some free bootable USB drive makers for Windows 11/10 to create a bootable drive from an ISO file. Create a multiboot USB!

We'll show you to create a bootable USB flash drive with the Windows 10 installer from a Mac. It's easier than you think, thanks to the built-in Boot Camp Assistant from Apple.

For those curious, it's possible to use a Mac to create a Windows 10 boot drive but the process is fairly involved and requires familiarity with Terminal, the Mac's command-line tool.