Mac OS X Lion support is ready in version 1.2.8. You can upgrade from Appstore.
1. Tap on the blue arrow on each server entry, server setting page will show up
2. Turn ON "Mac OS X Login"
3. Input your Mac username and password which you use to login to the Mac. You should be able to login.
To get your Mac username, on your Mac, go to Applications->Utility->Terminal, type whoami, then press Enter key, your username will be shown.
Troubleshooting:
1. you always get "Connection Failure. Authentication failed. Make sure the password is correct" error
Answer: (1) Make sure you are using the correct the username and password. (2) Although we suggest to use "Screen Sharing", but if you you are setting Remote Management, click on the Options button in the right bottom corner, make sure at least "Observer" and "Control" are selected, otherwise it won't allow you to connect.