I am using a MAC OSX 10.58, Leopard, on a PowerPC ibookG4. You cannot upgrade to Snow Leopard, 10.6, because it requires an Intel processor. I don't have the money right now to get a new machine, or a used Intel desktop.
The double clicking came from the Delphi 2006 book I use as a reference and it says to double click in the editor and the Menu will appear on the design surface. When I did this menu under windows, I just made my tabs, Open, Save, Exit, and made sure the properties were visible and enabled, and the menu displayed. However, with the MAC nothing happens. I am using buttons for now until this is solved.
I am using Lazarus version 0.98.28.2 beta, FPC 2.2.4,SVN 22296, powerpc-darwin-carbon(beta). I guess I should check to see if there is a more recent SVN but this problem does not seem to be one that would be still be extant.
Maybe you could tell what you do other than just plunk the TMainMenu componet down, double click it to bring up your editor, work on the Tab captions, hints, and properties. Do you have assign it an action to get it to display? I must be missing something just too simple. (In many cases the MAC is so simple to do something makes it more complicated--at least for the user. The developer seems to have the reverse situation. )
Fred
Fred