4oD Catch-Up is now available on a Mac thanks to the Adobe Flash Player, this also means it will work on Linux as well. 4oD Catch-Up now works the same as the BBC iPlayer pritty much apart from the odd advert and the option to set a pin code for adult content if you have kids. Channel 4 just need to get there ass into gear and bring out a download version of 4oD for the Mac, the BBC have a download version of the iPlayer for the Mac which came out a few months ago, under the iPlayer Labs section of the website. The iPlayer download service for the mac runs with the Adobe Air and Flash Player, so if Channel 4 are now using Flash for the online Catch-Up service, I would hope that maybe they are going to use the same tecnology the BBC has used for there download service.