I am running Mac OS 10.7.5. I recently updated my Skype client and it will no longer start. It displays the message "This version of Skype requires Mac OS X version 10.6 or greater and the latest version of QuickTime to run."
Steps I have taken to try to resolve the issue:
Reinstall Mac OS 10.7.5 update
Download and install most recent Skype client
Ran system Software Update
Deleted old Skype settings files
Attached is the logfile generated by Skype first aid.