M2TW works very nicely on an Intel MacBook Pro

[Dutch_guy]

Now I've got to figure out how to get past that wretched restriction on factions at the start...

Well, good to hear it's all working out for you Banquo

To answer the quoted:

Open medieval2.preference.cfg [in your MTW folder} and add this:
Code:

[misc] unlock_campaign = true

Or

OR edit the descr_strat.txt file. Delete lines number 10 and 11, ie:

Code:

end unlockable

Or simply destroy a faction on the campaign map to make it playable, this doesn't count for all factions though - better just edit the preference.cfg file.