Your Mac is too old to run it.

I have Skype 2.8 on Mac OS X 10.5.8. Under the the chat menu is an option called 'Recent Chats'. This allows me to see logs of recent chats, but not of older ones.

Click the system requirements on that page & you will see…

• 1GHz Intel processor.
• Mac OS X 10.5.8+.
• 100 MB free disk space.
• Either USB or regular headset if your Mac does not have a built-in microphone.
• Download drivers if you are using an external webcam.
• For voice calls recommend broadband connection with 100 kbps down / 100 kbps up.
• For group video calling everyone on the call needs Skype 5.0 for Windows or Mac or higher plus webcams. For best quality we recommend you use a high-speed broadband connection of 4Mbps down/512kbps up and a computer with a Core 2 Duo 1.8 GHz processor. As a minimum you’ll need a high-speed broad connection of 512kbps down/128kbps up and a computer with a 1 GHz processor.

Your Mac has a Power PC processor not an Intel CPU.

See Skype's FAQ for more info…

Skype For Business Mac

Jan 13, 2015 3:46 PM