Just FYI:
I bought a Logitech Wireless Performance Mouse MX last year and liked the small receiver that barely sticks out of the USB port. Part of the point of this receiver is that you only need
one for whatever accessories you have. The information on the Logitech site says that it works with number pads, keyboards, mice, etc., but I couldn't find a number pad that says it was Mac compatible. I broke down and bought one even though I knew it didn't work well.
Upon getting it, now I had one tiny USB receiver attached to my MacBook Pro, connecting to the number pad and mouse...but a couple issues were a challenge for me out of the box:
1. An extra "num lock" command sent before and after all regular keys, which actually sends a clear in Excel (no problem in a lot of apps).
2. The top "=" "(" and ")" send option and then two digits. I guess on Windows this translates to the appropriate characters.
Now using
KeyRemap4MacBook version 6.7.34 and above, a N305 modification is now available under "Change KeyPad Key > Logitech N305 hack." Developer of KeyRemap4MacBook, Takayama Fumihiko, selflessly fixed these problems through some back and forth email chatter. As a side comment, I use this software to make my MBP's right option key into an enter key (like the older MBPs, since often having a single press for enter is better than function return).
Now the keypad does everything I want it to do. It is a bit bigger than the corded unit I was toting around, but it does seem quite durable and allows me to use the single receiver (with a backup now) to run both devices. I do like that the comment says the included AAA batteries will power the unit for years.