dashcode

Managed to get it running, let's hope Apple updates the app soon.

Go to your Applications folder, right click (ctrl click) on the Dashcode app, click Show Package Contents and in there go to the MacOS folder. Click the "Dashcode" terminal application in that folder.

Dashcode should now launch... along with a terminal window, you have to wait a bit.

That's it... it should work... you still get the horrible cross sign on the app though. And it might ask for your permission to access you Contacts and everything else.

Note. You can drag this terminal app to the desktop to create an alias directly to it, this way you get a faster way to launch it.

Note2. To close the app, first quit Dashcode, then quit the Terminal app.

PS. Need is a wonderful teacher! I wish they would make this available in the App Store, i would pay for that. It's a niche app, not many people use it, but those who do know its worth.

Also... version 3.0.4 seems much more stable in Mavericks than 3.0.5

You can get that at https://developer.apple.com/downloads/

It's the March 2012 verison.

This post explains how to make Dashcode run in Mavericks:

https://discussions.apple.com/thread/5472249?answerId=24346831022#24346831022

Judging from the responses from Apple quoted in that thread, people should be dropping Dashcode like a bad habit.

And yet they remain hopeful that somehow, someway, somebody has found a workaround.

Sigh.