#Create a usb for mac how to
#Create a usb for mac install
#Create a usb for mac portable
#Create a usb for mac iso

In older versions of macOS, you could find all the previous installers in the list of purchased apps in your App Store account in older macOS versions. You can create a bootable installer for any operating system if you have the right installer. In this case, the system will be installed on that Mac, and the installation files will disappear when the process is finished.

If, however, you only want to reinstall macOS once on one computer, you don’t have to use a carrier.

#Create a usb for mac install

You might want to keep installing files on an external drive if you think you might need to install the operating system multiple times or on different computers. In the following instructions, we will use a USB flash drive as an external carrier example. Give your disk the name of the operating system, e.g., Sierra, Mojave, Catalina. Whichever type of drive you choose, make sure that it has at least 12GB of free memory.īear in mind-when you download an installer, the disk will be reformatted to suit the operating system you’re trying to run.

Use Terminal to create a bootable installerįor your external disk to run macOS, you can choose as a USB flash drive, as well as an SSD or HDD.

#Create a usb for mac how to

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?

#Create a usb for mac portable

If you have Homebrew or MacPorts, you can get a progress bar by installing the 'pv' command and using that instead of 'cat'.A bootable macOS (previously, OS X) install disk is a portable device containing all the necessary installation files for a selected version of macOS. No progress is shown while writing this way. You will be prompted for the administrator's password. r is for raw disk, as writing to /dev/rdisk2 is much faster than writing to /dev/disk2. dev/rdiskN is the same disk you have found previously, with an r in front. # sudo sh -c 'cat /path/to/downloaded.iso > /dev/rdiskN' Where /dev/diskN is the one you have found in previous step as per our example it would be '/dev/disk2'. In this case '/dev/disk2' is the one we want. Then note the corresponding /dev/diskN, where 'N' is for index of your disk. This will print out the list of currently mapped devices/partitions. Plug-in your USB stick and find what '/dev/diskN' it is mapped to by opening Terminal (where 'N' stands for 'disk0', 'disk1', 'disk2' etc). It now contains a bootable openSUSE installation media.

#Create a usb for mac iso

The process of burning can last from 1 to up to 30 minutes depending on your drive and on the iso file. The drive can be reformatted and used as a normal drive again after the setup is finished. Warning: All data on the drive will be destroyed.