USB Connected Classic or Ultra Classic functionality on Apple OS X / MacOS products
The USB version of our Classic and Ultra Classic will function just fine on an Apple OS X based products. But there will be a few keys that will require some explanation about how they function. The following list explains how certain keys on a 104/105 key Classic or Ultra Classic USB keyboard operate on OS X version 10.7.2 with default key assignments (earlier versions may vary slightly):
| Key description | OS X Function |
| Windows GUI key | Command |
| Alt key | Option |
| Windows App Key | No function |
| Insert Key | No function |
| NumLock Key | Clear |
| Print Screen Key | N/A |
| Scroll Lock Key | N/A |
| Pause Key | N/A |
The attached file provides a brief description of each Ultra Classic key on a Windows, OSX or Linux machine
-- Unicomp Support