@desia2003 Are you saying you can't click anything on the Main Menu? Does it help to switch between fullscreen and windowed modes? Use cmd-return to switch, and make sure the game window is in focus when you do.
If that's not the issue, please disable Origin in-game: hover over your username, select Application Settings, then the Origin in-game header, and disable the option at the top.
@desia2003 You can tell the game to run in windowed mode by changing the setting manually. Open Documents > Electronic Arts > The Sims 3, open the file labeled options.ini, cmd-f to search for "fullscreen," and set it to 0 (zero). Save and quit, and when you launch the game, it should be in windowed mode.
If that doesn't work, let me know what pointing device you're using (trackpad, magic mouse, a mouse not made by Apple, etc.), and if you can, please test with a different device.
@desia2003 Are you actually in windowed mode (fullscreen = 0), or do you see black bars along the sides of the screen? The latter happens in fullscreen: the game window doesn't fit the screen size, and the black bars take up the extra space.
Anyway, fullscreen = 1 makes the game run in fullscreen, and fullscreen = 0 makes it run in windowed mode.
@desia2003 Normally you could open the file with TextEdit, which is already installed in macOS. But please do try the mouse, and if it doesn't work, you can try fullscreen mode.
