SD is crashing a lot in macOS 27

SD has been crashing quite a lot yesterday and this morning.

I updated to macOS 27 last Tuesday (Eastern Australian time). Have been working in SD yesterday and today on a very small script file. The script is working on a plain text file of around 400KB.

It’s also crashing when I close my very large applet.

SD seems to crash more often immediately after closing script files.

Is there something in macOS 27 to be wary of ? Has it changed any limits ?

I’ve attached a crash log in case it helps.

Script Debugger-2026-09-20-153834.ips (41.1 KB)

Looking at the crashlog. Are you using a Macbook with a touch bar? If so, is there a way to disable it?
Also, if there’s still a Font Doctor app to make sure all your fonts are okay, run that, as it may also be related to a font issue. Nothing else comes to mind.

Thanks for the thoughts. I’m using a Mac Studio M1 Max. I’ll check fonts if I can. I’ll also export my code to plain text and import back into SD in case that helps.

There’s a related issue. I often run my applet from the Desktop (ie. outside SD) to test changes. It now crashes every time on startup. I do check that every script is compiled etc. But, the crashes are before the code gets to the applet’s first dialog. I’ll put in a few test dialogs earlier in the code to test whether the crashes are in my code or before my code starts. At present, only way to run without crashing is to export run-only or to run from within SD.

I’m seeing the same problem. Script Debugger 8.0.10 appears to have a compatibility bug with macOS 27’s text-editing system.

From inspecting my own crash reports, AppKit is attempting to create a weak reference to an editor object that was already in an invalid teardown state, so the Objective-C runtime aborts the application.

This would be an easy fix if the app were still being maintained, but it looks like for now the answer is ‘don’t upgrade to macOS 27 if you rely on Script Debugger’.

Hey folks! Check out the beta release just posted here, and let us know if it addresses the problem for you. ANNOUNCE: Script Debugger 8.0.11 (8A89)