I get a "Computer supported" pop-up when I try to buy the upgrade. This is my system profile:

I get a "computer not supported" pop-up wgen I tried to buy the upgrade. My computer is about mid-2007 vintage. Is the age of my iMac the problem?? This is my profile:

Model Name: iMac

Model Identifier: iMac6,1

Processor Name: Intel Core 2 Duo

Processor Speed: 2.16 GHz

Number of Processors: 1

Total Number of Cores: 2

L2 Cache: 4 MB

Memory: 2.5 GB

Bus Speed: 667 MHz

Boot ROM Version: IM61.0093.B07

SMC Version (system): 1.10f3

Serial Number (system): W87091B6VGN

Hardware UUID: 00000000-0000-1000-8000-0017F2D6D3DF