afpdmgmacos
I noticed this with TrueCrypt volumes. Before 10.8, whenever I mounted a .dmg on my iMac, I could access it automatically from my mbp over the network with afp sharing. But after upgrading to Mountain Lion, apparently this is not working anymore.
Furthermore, I if explicitly share the mounted .dmg, I have no error on the iMac , but on the mbp the share is not visible. It's only me or this is a new "feature", may be related to security ?
OK, I sussed it out. You can still do it, it's just that the way you do it is based on context rather than using the appropriate command.
Basically, to use the virtual display, you need multiple user accounts on the target machine, and you need an account to be already logged into the target machine such that you can login a 2nd time using the virtual display. Any account you wish to log into obviously needs the associated sharing rights enabled. Then follow the following logic:
If you want to use the virtual display for privacy reasons, you cannot simply switch to it like you could in 10.7, but you could simply leave the target machine with Guest logged in on the Hardware display to allow you to login as your primary user on the Virtual one.
The FTP server in Mountain Lion is still there, just not part of the GUI. You can re-enable it using the following in Terminal:
sudo -s launchctl load -w /System/Library/LaunchDaemons/ftp.plist
To disable, do unload instead of load.
*The FTP root directory is your Users home folder.
Best Answer
I've got the same problem.
I used a .dmg mounted on my imac to store time machine backups for my macbook pro over the network.
Since upgrading to mountain lion I'm unable to access the network share from other macs. This seems to be the case for all .dmg files that I've tried to share over afp.