Make sure your empty USB key is still inserted. Launch Terminal from the Applications:Utilities folder. When asked to confirm click the Partition button. Next click the Apply button to save your changes. Set the Partition Layout to 1 Partition, set the Name to 'Mavericks', and set the Format to Mac OS Extended (Journaled).Ĭlick the Options button then choose GUID Partition Table from the popup window then click the OK button. Select your USB thumb drive from the list on the left and click the Partition tab. Launch Disk Utility from the Applications:Utilities folder.

If you are already on, or have already downloaded Mavericks, you may need to click the Download button. Navigate to the OS X Mavericks application page and click the Install button. These are instructions on how to create a bootable OS X Mavericks USB key.Ĭonnect a 8GB or larger USB key to your computer then launch the Mac App Store from your dock.