It is advisable that you state the specifications of your computer and applications when you ask questions.
(1) Computer and memory (e.g. iMac 2.8 GHz 2 GB RAM)
(2) Mac OS (e.g. Mac OS 10.5.4)
(3) Mac OS (e.g. Windows XP Service Pack 3)
(4) Game title (e.g. Call of Duty 4: Modern Warfare)
(5) Video card (e.g. ATI Radeon HD 2600 Pro 256 MB)
Why? Not stating them will confuse readers and those who try to help you.
Consequently, you will end up wasting your time and theirs.
But you don't have to do it if you don't want to. Please note that a question without stating computer/application specifications may be intentionally ignored or deleted.
