Make OSX bootable usb

1. Download Mavericks at App Store
2. Download DiskMaker X here.
3. Launch DiskMaker X
4. Click button ‘Mavericks 10.9’
5. Click button ‘Use this copy’
6. Use at least 8GB USB pendrive.
7. Click button ‘Erase then create the disk’
8. When bootable disk finished, there is one pop-up window.
9. Restart & hold alt/option key
10. Choose the bootable USB drive.

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