That's really on the low end of things, but I think it'll run the game on low.
If you're planning on getting the game through Origin, it might be worth bearing in mind the Great Game Guarantee exists. If you launch the game and performance is unacceptable, then you can return the game for a refund, no questions asked.
Be sure to check that your OS and chipset drivers are all up to date, too.
OS: Mac OS® X 10.7.5 (Lion) PROCESSOR: Intel Core 2 Duo 2.4Ghz Processor or better VIDEO CARD: NVIDIA GeForce 320M, 9600M, 9400M,ATI Radeon HD 2600 Pro or better. Video RAM of 256MB or better. MEMORY: 4GB RAM HARD DRIVE: 10 GB of Hard Drive space
The "graphics" section on your Mac's About page will probably be the most important thing to check. If you're unsure, you can post the details from the overview here and we can check if your machine is up to the task. Please don't post the serial number though.