Windows – Connect Apple Thunderbolt to Lenovo T420s

The Apple mini-DisplayPort to VGA or HDMI adapter terminates the Thunderbolt chain where it is connected, so until Apple released new MacBook Pro with two Thunderbolt ports (similar to the iMac that has two ports) then you will only get one video signal from the device through the Thunderbolt port.

You may find an inexpensive USB to VGA solution to get around this limitation. Initially they were slower, but the newer ones are getting much faster and the software much better. You can then put the most important content on the Thunderbolt port and have the secondary display served over USB.

Should a Thunderbolt adapter come about that drives two displays, I'll update the answer, but nothing has been released (or even rumored) even though it's clearly something the protocol could support.

I like this knowledge base article for the clear deprecation of which Macs support two Thunderbolt displays and which ones only support one.

• Apple Thunderbolt Display (27-inch): Connection options for Thunderbolt Macs

You might consider a TV tuner with HDMI output like this:

http://www.newegg.com/Product/Product.aspx?Item=N82E16815260027

Then an HDMI to Display Port or Mini Display Port (Thunderbolt is backwards compatible with Mini Display Port. Display Port would need an adapter to the Mini variety) like this:

http://forums.macrumors.com/showthread.php?t=962633

Shop around for devices such as these. No idea how well any setup would work, I'd love to hear back how well it works out.