An 8GB or larger USB flash drive, or an 8GB or larger partition on some other kind of external drive. The OS X 10.9 Mavericks installer from the Mac App Store in your Applications folder.

Getting Lion from the App Store is convenient, but if you want a physical copy of the installation, you can easily make your own Lion install DVD or USB drive with Disk Utility. If you want to do ...

How to create a bootable Windows 7 USB flash drive Looking for a quicker way to install Windows 7 than via DVD? Try this.