Ventura’s installer is over 12GB, as was Montereys, and Big Sur’s topped 13 GB. It’s important to use a drive with enough capacity to fit macOS. Generally, though, USB flash drives are favored - they’re small, convenient, affordable, and easy to work with.

Use Terminal to create a bootable installerįor your external disk to run macOS, you can use most external USB drives, including solid-state drives and traditional hard drives.

In this article, you’ll find detailed instructions and answers to your questions on how to make a bootable USB on Mac. You can try out the different tools for free, so download it, and see what you think. MacKeeper can do everything from finding malware to updating your apps for you.

When the scan is finished, review the results, and click Fix items safely.

Select Find & Fix from the menu in MacKeeper.

You can do that with MacKeeper’s Find & Fix feature, which will scan your Mac for a variety of different problems. It’s a good idea to keep your Mac optimised when you’re asking to create a bootable USB drive. It’s a handy appliance-even more so if you use a small external flash drive that you can carry in a pocket. You can also use it to reinstall the operating system on a Mac that won’t startup. Such a tool allows you to install any version of macOS on multiple Apple computers easily.

Why would you want to create an external boot drive for your Mac? I prefer keeping Lion on a USB keychain so that I can add files to the USB drive to customize the installation but if you’re just looking for a bootable copy to troubleshoot your hardware, feel free to go with the DVD option and save yourself a little cash.A bootable macOS (previously, OS X) install disk is a portable device containing all the necessary installation files for a selected version of macOS. (If you happen to own a Mac with a disc drive, consider creating a DVD backup of Lion.

The app will give you the option of creating a bootable drive out of either a DVD or a USB keychain. Start the Lion DiscMaker app with your USB flash drive plugged in and with the Lion install file sitting inside your application folder. Lion DiscMaker makes this part of the process a snap. You have been warned! Creating Your Bootable Drive Now, before you start formatting your drive, back up anything currently on your flash drive that you’d like to keep–because this process will completely erase the contents of the USB drive and rewrite it with a copy of Lion. Downloading a third-party app just to handle this process is a bit of a bother, but Lion Discmaker enormously simplifies the process of installing Lion on a USB keychain. To streamline the process, download the free Lion DiscMaker app. If you already own a copy of OS X Lion, you should be able to download a fresh copy at any time from the Purchases tab of the Mac App Store.

Create mac os lion bootable usb