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Open Disk Utility by following Applications Utilities Disk Utility. To install macOS on an external hard drive: 1. Now that you have the installation files ready on your Mac, you can move them to your USB drive for future use.
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Navigate the file structure to System | Installation and delete the alias to the Packages directory ( Figure J) Create bootable USB drive with Mac Disk Utility. Once the files have finished copying over, the drive should mount automatically.The process may indicate in excess of one hour, but in my experience, the process takes significantly less time to complete ( Figure I).Upon verifying that the fields are correct, click the Restore button and select Erase from the application, if prompted to do so ( Figure H).For Destination, drag and drop the partition created on the USB drive onto the textbox ( Figure G) Drag the BaseSystem.dmg over to the Source text box.Go back to Disk Utility and click on the newly formatted USB Drive in the menu, then click on the Restore tab.dmg file and locate the hidden BaseSystem.dmg ( Figure F) Navigate the file structure Contents | Shared Support and double-click the InstallESD.dmg file mount OS X Install ESD on the desktop ( Figure E).Right-click the file and select Show Package Contents ( Figure D)
Make iso bootable usb os x mac os x#
Make iso bootable usb os x how to#
In April, I wrote an article on TechRepublic about how to create a bootable USB to install OS X.