I have taken too much time trying to make Colligo Briefcase work on Mac OSX. It gets partially through the sync then fails with a “server error 500”. The logs are impenetrable. Can’t see any resources on their support forum to give me guidance. I emailed Colligo support, but they want me to pay them for their support. From here it looks like a flaw in their product, or at least a misleading error message.
Good news. The uninstall app seems to work.
Update 2015: Colligo changed to a “new” product called Engage. It is no better. Crashes on my machine. I contacted their support on this and they would not help as I did not have a support contract. Humm. Bought the product. Does not work. They won’t help without extorting more money. Bye.