Download the old version of Skype for Mac. A few months ago Skype has been release the new version 7.56(776) for Mac OS after issuing we got problem with some MacBook running on OS version lower then 10.9 we need to upgrading our MacOS X to 10.9 or above for installing the newest version of Skype 7.56(776), But some old generation of MacBook. The tool uses a peer-to-peer technology based. A free tool that lets you talk to other users using text chats, voice and/or video conversations. Skype is the world's leading VoIP calling service. So now I have an solution for fixing Skype problem on old generation of Mac OS X running on lower then 10.9, But it may not working on some function but at least we can use Skype for test chat on our MacBook below is the instruction. A few months ago Skype has been release the new version 7.56(776) for Mac OS after issuing we got problem with some MacBook running on OS version lower then 10.9 we need to upgrading our MacOS X to 10.9 or above for installing the newest version of Skype 7.56(776), But some old generation of MacBook can’t upgrading to that version because new version of Mac OS X can’t support with some old generation of MacBook I think hardware capacity of old generation of MacBook is to small it is digital to run the latest of Mac OS X.