Yes, You need admin to install on windows, and mac. Not 100% sure about linux.
answered Jan 04 '12 at 11:00 PM
Because it is an actual program, you will be prompted with the User Account Control on Windows, requiring you to enter an Administrator's username and password... On mac is the same!!!!!!
That's why I think it's good now that Unity is publishing for Flash!!!!!!!!
answered Jan 05 '12 at 01:05 AM