You can only share your screen if you have the right kind of computer and Internet connection:
- Windows 7, 8, Vista, XP, Server 2008 (32 or 64-bit) with the latest service pack
- Latest build of any 64-bit OS X: Snow Leopard (10.6), Lion (10.7), Mountain Lion (10.8), Mavericks (10.9), Yosemite (10.10)
- Broadband connectivity to the Internet (i.e., T1, cable modem, ISDN or DSL)
Can't find the join.me toolbar? Maybe it's hiding. That is, if you are using more than one monitor, look for join.me on your primary monitor. It will always start on your primary monitor, even when you launch it from a secondary monitor.