Hey albanwr, welcome to the Cafe, hopefully there may be some information that can help you here.
Whilst I am no Mac user, I know numerous Mac users have been here and posted, and folks have supplied them with help that resolved their problems.
At this stage my best suggestion is to use the search facility and find all the other Mac user concerns and read them.
To do this:
i) Click the 'search' tab at the top of the page.
ii) click the advanced search option.
iii) Type in the word Mac (can always try apple too).
iv) Scroll down and click on the 'check all' tick box - this will un-tick all the forum sections.
v) Then tick the 'technical questions' and the 'scenario's boxes to activate (search) just these. - Make sure this is for Tropico and not Tropico 2 Pirate Cove.
vi) Scroll down to the bottom and replace the '60 days oldest post' with 720 days.
vii) Open up the search hits to, say, 150.
vii) Hit search.
I have done this myself and found a fair few Mac problems, but as I am not a Mac user I do not presume to know what they relate to.
Hope that helps albanwr.