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There used to be the ability, perhaps before OS X, to send messages accross the local network, which displayed a popup on the receivers machine with the message. Is this still possible? Or is there another way to send a message to another member of the network?

If this isn't possible, could a text file be sent, with a message, to a recipients Public folder?

Preferably with the terminal.

(I realise there are lots of aps which do messaging, but I was curious if this was possible without installing software or setting up iChat etc)

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Just to be sure, you want to send a message from a Mac to another Mac? Or is there a Windows computer involved? Could you also add which OS versions your machines are using? – Saaru Lindestøkke Feb 18 '13 at 21:23
mac to mac. what kind of animal uses windows? not a wildebeest anyway – wildebeesty Feb 18 '13 at 23:08

According to this metafilter post you can send a message using Applescript (pre-installed on every Mac) and Growl (old version is freely available). The relevant part is quoted hereunder.

tell application "GrowlHelperApp" of machine "eppc://"
register as application "myapp" all notifications {"message"} default notifications {"message"}
notify with name "message" title "title"   description "description" application name "myapp"
end tell     

Here should be substituted by the IP address of the sender.

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That's interesting, but its a third-party program. Is there something which would work with a base OS X install? – wildebeesty Feb 19 '13 at 12:01

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