OS X (Apple)

I've used say on users before as a prank (as in co-workers) and it works. Hmm, when I run a shell script as root the apple script works and it also works when I use the send unix command from ARD admin.

I have not tried osascript over ssh, but let me try it now

Code:

bash-3.2# osascript -e 'tell application "System Events" to display dialog "Hello World!" '
button returned:OK
bash-3.2#

Worked for me over ssh. I have two iMacs on my desk at work and that one liner did it, and when I hit OK on the remote computer it returned back that I hit OK.

The only time this may not work is when the system is at the login Window. Say works too. Though do note that I am ssh'd in and able to sudo so you are correct that you would need sudo rights on these machines.

...surprise surprise, I said it demands elevated access. ...again, as admin -- surprise surprise. This only works for elevated users.

So to do this remotely you have to log in as root or admin all the time.