Is there something I'm missing?
Your system does not meet the system requirements.
Do you know which requirements I need to fulfill?
Below is what I could find and it seems that I have what is stated:
Minimum System Requirements: Multicore Intel processor with 64-bit support, Mac OS X v10.5.7 or v10.6, 2GB of RAM, 4GB of available hard-disk space plus 2GB of space for optional content; additional free space required during installation (cannot install on a volume that uses a case-sensitive file system or on removable flash-based storage devices), 1280×900 display with OpenGL 2.0–compatible graphics card, DVD-ROM drive, QuickTime 7.6.2 software required for QuickTime features, Broadband Internet connection required for online services
1 person found this helpful
It is very likely that you are using a 32-bit computer. After Effects CS5 and later and Premiere Pro CS5 and later require a 64-bit computer.