What is Macintosh equivalent of relaunch handler?

Martin Koob mkoob at rogers.com
Thu Mar 28 17:26:43 EDT 2019

I checked the LiveCode dictionary in my hot off the press PDF version to see
if there was more info on what data request AppleEvent data could give.   I
found a reference to

For more information about Apple events, see Apple Computer's technical
documentation, Inside Macintosh: Interapplication Communication, located at

Once I saw 'Inside Macintosh' I suspected this is a dead link.  I found that
is already noted in bugzilla -

I did a quick search on and found this in Apple's documentation 
https://developer.apple.com/documentation/coreservices/appleevent.  Should
this be the link for that dictionary entry?

Martin Koob

Bob Sneidar via use-livecode wrote
> Hi Bill,
>> I want my application to be able to catch parameters sent to it via
>> the command line.
>> The relaunch handler does that for Windows applications and also
>> doesn’t open another instance of the application. You are correct that
>> Mac apps run in a single instance by default and that is the behavior
>> I want.
>> I don’t want to open a document…I want to do something with the
>> command line parameters sent to my app.
> The simple answer is that there isn't an equivalent.
> The relaunch mechanism on Windows was added to make it easy to add 
> single-instance like behavior on Windows (just as macOS has).
> However remember that macOS has the AppleEvent system for making it easy 
> to do inter-process communication, so on Mac you could use that.
> i.e. Make the command-line tool use AppleScript (either by do ... as 
> applescript) or the 'send to program' syntax to send apple events to 
> instruct the main app.
> Warmest Regards,
> Mark.
> -- 
> Mark Waddingham ~ 

> mark@

>  ~ http://www.livecode.com/
> LiveCode: Everyone can create apps
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