I have a solution built in Windows using FM Pro 16 that also needs to run on a Mac. Users open detailed windows for customers, contacts etc. from a menu window which has been designed to sit on the left while the detail window appears on the right. The position of the window is determined by calculating a variable $$windowright as Get(WindowLeft)+Get(WindowWidth) from the menu window, and specifying this as the new window distance from the left of the screen.
This effectively pops up a new window right next to the menu window on a windows PC but having tested on a Mac the new window is being created on the top of the menu one, as a new window would be if no position and size data were being used. The new window does a resize to fit after it opens, I am not sure if this is the cause, but again it works fine on the Windows machine.
Has anyone else come across this?