HOW TO INSTALL NEW MAC OS FROM USB DOWNLOAD

Open a Terminal Window and copy or type the following command: Step 3: install Mavericks as a bootable USB drive with a script

HOW TO INSTALL NEW MAC OS FROM USB DOWNLOAD

The Mac Store will save it as a file on disk, and we will use a script to quickly access it.Īs you download it, the Mac Store will point out that you are already running on Mavericks, but click on Continue and it will download the file. You have to do this since the Mavericks.app installation file was deleted at the end of the previous upgrade. Step 2: retrieve the Mavericks.app file from the Mac Store Download Mavericks from the Mac Store. If you already have a volume using that name, pick another name and change the script below accordingly).īefore doing this, verify that there is nothing that you need on this USB drive – data from it will be lost. Erase all data and rename the drive to a specific name: the script that we will use later will erase the data again, but it does need the correct name for the USB drive.įormat the drive using “Mac OS Extended (Journaled)” and use a new name.

Insert it into a USB slot and launch the Disk Utility. Prepare a USB disk of 8GB+ to receive the Mac OS Mavericks installation (the compressed download from the App Store is 5.3GB, so it will expand somewhat on our disk). Insert a USB drive and change its volume name if needed

How to install new mac os from usb