i was trying to rotate a attraction. I remember on my old pc back in the days i used page up and page down. But i don't know how to do this on my Mac.
Also I don't remember how to delete/remove buildings attractions.

Any ideas?

I don't remember being able to rotate attractions. But you can delete an attraction by taking the query (?) tool, clicking on the admission booth and then hitting the X button on the info screen. You can also move the entrance or rename the attraction in this screen.

I can confirm that there is no rotation functionality in the original. Toilets orientate themselves to paths however and yes entrance booths and exit steps for rides can be located / relocated appropriately.

Full rotation functionality came in the sequel - Theme Park World (Sim Theme Park)

edit: renaming the rides are a cheap laugh for me.... This is the first day of the end of your life - for the rollercoaster - it scrolls along in the sign above the ride entrance!