I installed Ubuntu 12.04 LTS on my iMac (27-inch, mid 2010 model, identifier is 11,3).
So far no show-stoppers but I did notice that the back of the iMac is much hotter when running Ubuntu for several hours compared to when it runs OSX Mountain Lion.
This brings me to my next point, I installed the vanilla Ubuntu 12.04 LTS, but on some sites I was reading they pointed to a version that contains mac related packages.
So my question is what are these mac related packages? Are they worth installing? Anything to do with proper power and fan control on the imac?