I am seriously considering switching to a MAC computer but one of my concerns is the use of ebooks.
I am currently working with a sony 505 but I typically purchase mircrosoft reader books and use convertLIT to remove the drm and calibre to convert to a usable format. I am also in the process of learning how to use MobiDeDRM in order to be able to convert .mobi books as well.
I do this because I don’t want to be stuck with book formats that are limited to a few devices. (but I do purchase all my books -- no pirating going on)
Will these programs/device work with a MAC computer? Now, I am pretty confident that .lit books wont work with a mac (seeing as it is a Microsoft product) but what about MobiDeDRM? And what about calibre? And Sony 505?
If they don’t work, is there a MAC version of the programs, or any other programs out there that are intended for MACs?
Also, I checked sony’s website, and it looks like there software is not compatible with MACs, does anyone know of a software that will work on MACs that can be used to load the books onto the sony reader?...I use calibre on my pc, will that work with MACs?

~Thanks in advance!
PS. I would like to apologize if this is an inappropriate forum for this thread. I couldn’t find a good place to post it.