Like Lion (OS X 10.7) before it, Mountain Lion (OS X 10.8) doesn’t ship on a disc—it’s available only as an installer app downloadable from the Mac App Store ...

Bootable disc image files may contain all the data necessary to create a disc from which computers can boot, but if you want them to work, you can't just burn them to a disc the way you would regular ...

[Editor’s note: This article is part of our series of articles on installing and upgrading to Lion (OS X 10.7). We also have a complete guide to installing and upgrading to Mountain Lion (OS X 10.8).] ...

Is your Mac about to crash? Here's how to create a bootable USB flash drive with a working version of macOS, so you can access your hard drive in the event of a glitch. Lance is an experienced writer ...

Trying to burn to a single layer DVD which has 4,707,319,808 bytes available and the .dmg image uses 4,348,218,934 bytes yet Disk Utility insists "The disc inserted does not have enough free space." I ...