plants vs Zombies is not working

Since I am unaware of any Garden Warfare game for OSX, I suspect you posted in the wrong forum.  Here is the (WinTel PC) game requirement rundown: 

Plants vs. Zombies Garden Warfare

    Required: Internet connection required to install and play
    DVD-ROM: N/A
    OS: Windows 7/8 64bit
    Processor: Intel Core 2 Duo @ 3.0 GHz
    Video Card: NVIDIA 8800GT, AMD/ATI Radeon HD 5750
    Sound Card: DirectX 9.0c
    Compatible Memory: 4GB RAM
    DirectX: 10.0+
    Hard Drive: 15 GB
    Input: Keyboard, Mouse or Dual Analog Gamepad

Recommended System Requirements:

    Supported OS:Windows 7/8 64bit
    Processor:Intel Quad Core / AMD Six Core
    RAM: At least 8GB RAM
    Hard Disk: 15 GB
    Video Card: AMD Radeon 7870 3GB or Better / NVIDIA Geforce GT660 3GB or better
    DirectX: 10.0+
    Sound Card: DirectX 9.0c Compatible
    Input: Keyboard, Mouse or Dual Analog Gamepad

@amtrak1017 

Your question was answered in the forum you posted it in.