If you want to use your USB stick with an Apple Mac, you will need to restart or power-on the Mac with the USB stick inserted while the Option/alt ⌥ key is pressed. Instead, select Eject and remove the USB device. Warning: After the write process has completed, macOS may inform you that 'The disk you inserted was not readable by this computer'. When everything has finished, Etcher will declare the process a success.Ĭongratulations! You now have Ubuntu on a USB stick, bootable and ready to go. This will be followed by a validation stage that will ensure the contents of the USB device are identical to the source image. The Flash stage of the process will show progress, writing speed and an estimated duration until completion. As with Disk Utility, Etcher needs low-level access to your storage hardware and will ask for your password after selection.Īfter entering your password, Etcher will start writing the ISO file to your USB device. You will be warned if the storage space is too small for your selected ISO.įlash! will activate when both the image and the drive have been selected. Select drive, replaced by the name of your USB device if one is already attached, lets you select your target device. By default, the ISO file will be in your Downloads folder. Select image will open a file requester from which should navigate to and select the ISO file downloaded previously. If you are still warned against running the application, click Open Anyway in the same pane.Įtcher will configure and write to your USB device in three stages, each of which needs to be selected in turn: To side-step this issue, enable App Store and identified developers in the Security & Privacy pane of System Preferences. After downloading this and clicking to mount the package, Etcher can either be run in place or dragged into your Applications folder.īy default, recent versions of macOS block the running of applications from unidentified developers. To write the ISO file to the USB stick, use a free and open source application called Etcher. Warning: Disk Utility needs to be used with caution as selecting the wrong device or partition can result in data loss. Set the format to MS-DOS (FAT) and the scheme to GUID Partition Map.Ĭheck you've chosen the correct device and click Erase. Select the USB stick device (you may need to enable the option View -> Show All Devices) and select Erase from the toolbar (or right-click menu). Insert your USB stick and observe the new device added to Disk Utility.

Launch Disk Utility from Applications -> Utilities or Spotlight search.

To ensure maximum compatibility with Apple hardware, first blank and reformat the USB stick using Apple's 'Disk Utility', but this step can be skipped if you intend to use the USB stick with only generic PC hardware. An Apple computer or laptop running macOS.

Bootable usb creator mac