This POS crapware is to be avoided. It has been turned into a Microsoft product, with the usual crapification. Here is the supreme crapification:
All you need to get started is Mac OS X 10.5.8 or above, a webcam for video calls and a microphone.And yet v6.19.blah requires OS X 10.9.x. FSCK -U Microsoft.
Skype for Mac
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.
FSCK -U Microsoft.