QUESTION :
Is is possible to have more than 16 desktop “spaces” with Mac OS X Snow Leopard?
I know that it does not seem possible at all from the System Preferences settings, but I was wondering if there exists some software tools that would enable one to use more Spaces, say 20-25.
ANSWER :
The setting is in Library/Preferences/com.apple.dock.plist with the keys workspaces-cols and workspaces-rows, respectively.
Try to set it and then restart Dock. At least on my computer, however, values over four are ignored, so the following procedure should not really help:
defaults write com.apple.dock workspaces-cols 5
defaults write com.apple.dock workspaces-cols 5
and then
killall Dock
Link up to a monitor, change to non-mirror display, then you can add more desktop in the monitor screen. After you disconnect, you will get more desktops.