How to enable iTunes Match on your Mac or Windows PC with iTunes

[iMore.com]

Not only does iTunes Match let you store your iPhone and iPad music on the cloud, but it lets you do the same across Mac and Windows PC computers as well. For example, if you have your entire music library on your iMac, you may not want to use the hard drive space on your MacBook Air. Instead, just use iTunes Match to stream music. This method isn't just convenient, it can also result in you saving tons of hard disk space on your Mac.

Full story from the iMore Blog...