sorry the wrong 3d but i can't open a new 3d..
maybe because i'm a new members..
and sorry for bad english.. i'm italian.
You can open "New Threads" via the

this is first time that i try to play a game on mine mac (buy one months ago).
mine friend pass me Call of duty modern warfare 2.mdg
the mac create a virtual image of it.. unless install, only with double clik i lounce the game.
after about 30 second appear me a message:
" invalid version" i can click on botton "exit".. but after about 30 seconds appear me yet the same message..
how i can solve it?
thanks.
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You can solve your problem by buying the game.
Warez/Serials/Keys.
Do not post software serial numbers or keys or refer people to specific websites, software, or techniques whose purpose is to break or bypass software licensing methods, distribute cracks, or obtain or use commercial software or media in violation of its license and/or for copyright violation. Do not ask for or give such help.
from https://macrumors.zendesk.com/hc/en-us#Things_Not_to_Do
Also have a look at the following links, as the information presented there might be helpful in your future endeavours into Mac OS X and could clear up initial confusion and may even prevent harm to your system or your files.
Mac OS X Basics
Switch 101 - guide with articles made by Apple on how to accustom yourself, after you switched to Mac OS X from Windows
Mac 101 - How to get started with Mac OS X
Find out how - tutorial videos made by Apple on how to do certain thing in Mac OS X
Pro tips - tips made available by Apple for easier ways of doing certain tasks
Mac OS X Keyboard Shortcuts - Learn about common Mac OS X keyboard shortcuts.
Mac OS X Beginner's Guide by MacRumors - learn about software, media players, shortcuts and some useful tips, tricks and hints
Mac Guides - tutorials, product guides and more
"How to maximise your MacRumors troubleshooting experience" created by mad jew in 2006