Summary: I picked this up to replace the "Genuine Apple" 10/100 adapter one of my puppies chewed to pieces. As promised on the packaging, there are drivers for OS X .4 (Tiger), .5 (Leopard), .6 (Snow Leopard), and .7 (Lion). I'm writing this on a Late 2010 MacBook Air running Snow Leopard 10.6.8.
If you want the ultimate USB to Gigabit Ethernet adapter, this is IT!
P. Martin, Amazon
13 February 2012
Summary: This adapter works perfectly with my XP machines and my WIndows 7 - 64bit as well it works on all Windows version I've tried so far. I'm pretty sure I had it working in some Linux distro too. It works on all speeds and duplexes.
Crashed & destroyed my W7-64 VM partition on MacBook Air
SFO Alan, Amazon
1 February 2012
Summary: If I could have given this product a zero star or even better a negative star review I would have. I have a MacBook Air which is running Fusion. I made a virtual machine and installed Window 7 Professional 64 bit. I installed Office, Photoshop, and a few utilities.
Summary: I bought two of these, one for my Macbook Air, one for my wife's Acer Aspire S3, hoping to speed up backups at home and to use on a business trip in a hotel that didn't have wifi. On the S3 (running Windows 7) it was a disaster: The driver blue-screened constantly, and it was anything but speedy.