Here's the setup:
- Lion iMac connected with ethernet cable to Snow Leopard tower without screen.
- File sharing is enabled on the SL and I can connect from the Lion.
- The connection from Lion uses a SL admin user/pwd.
- Screen sharing was enabled on SL and was working (i.e. I could work the SL machine from the Lion iMac), but I accidently turned it off (!@#$%^&*).
How can I re-enable screen sharing on SL? (No, I don't have an extra screen lying about.)
I was going to try something like this:
But couldn't get SSH to work from terminal without having the SL IP address which I can't figure out how to get.
Bonjour Browser saying there is a "Remove Frame Buffer", and that you were prompted for a username/password says that the screen sharing server is running on the headless Mac. However, that fact that you were denied access for a valid account and password is a strong indication that the System Preferences -> Sharing -> Remote Management (or Screen Sharing) -> Allow Access For: section is denying you access for the account you specified.
I think you will have to find a monitor.
Unless you have another Mac that can boot Snow Leopard. If you have another Mac that can boot Snow Leopard, then assuming you can plug in a keyboard to the headless Mac, then you could boot the headless Mac into Target Mode (Boot holding Command-T). In Target Mode the headless Mac becomes rather large external Firewire disk drive. If you then connect a Firewire cable between the Headless Mac and another Mac, you should be able to boot the other Mac holding down the "Option" key to see the headless Mac's disk as a bootable disk. You could then boot up the other Mac using the headless Mac's disk, and then configure your sharing prefs as you need.