Mac upgrade and peripheral maker XLR8, has gone out of business.

A note on the company's home page reads: "XLR8 has closed its doors and is no longer in business. There is no technical or warranty support available. We apologize for any inconvenience."

The company last month attended Macworld Expo New York.

Interex, XLR8's parent company, was purchased two years ago by power-protection-equipment maker Tripp Lite.

Tripp Lite remains in business. XLR8 was unavailable for comment.