The CoreStorage volume manager behind Apple's Fusion Drive can be used to create your own spanned volumes in any Mac running Lion or later.

Setting up lots of Macs? Want an offline installer? Here's how to roll your own. Read the whole story ...

I recently loaded OS X Mavericks on an old (2007) 20" iMac, and to check that everything was fine I ran the machine through the full Setup Assistant -- setting up a user with my name in the ...

The OS X 10.10 Yosemite installer from the Mac App Store in your Applications folder. The installer will delete itself when you install the operating system, but it can be re-downloaded if necessary.