I am running Scapple 1.5.3 on macOS Tahoe and it crashes reliably every time I launch it.
I uninstalled it and downloaded a fresh copy from L&L download page after uninstalling my current version and it made no difference. I have been having this issue for a few months now. I am finally getting a round to contacting you. I like this app and I would like to use it.
-Tommy
What version of Tahoe do you have? The Apple → About This Mac command should tell you.
Also, the latest version of Scapple is 1.5.4, not 1.5.3. Make sure that’s what you have installed.
I am running Tahoe 26.3.1 and Scapple 1.5.4.
Please open a support ticket, here:
Please include a copy of the crash report.
In the meantime, can I suggest moving the Scapple preferences file out of Library > Preferences to somewhere like the Desktop and then trying Scapple again.
If that sorts it, then you’ll need to reset all your preference settings; if it doesn’t, then just trash the new one which will have been created and move the original one back, ready for when the team have sorted you out.
Mark
Hi, same problem here. constant crashes. Tahoe 26.3.1 and Scapple 1.5.4
Crash report attached
scap report.txt (40.9 KB)
I fixed it with Claude 
What was the nature of the fix? I’ve got the same problem. Just keeps crashing on launch.
Update on Scapple Crashing. When I run Scapple 1.5.4 on my MacStudio it runs just fine which is also running Tahoe. I received a message stating that I should update Scapple. I did and it worked after that. I thought I was on the latest version but apparently I was not.
always taking the hard route, I vibe coded my own version of scapple 
A bit long winded but i urgently needed to access the mind map and it actually worked.
I would not recommend it though. I have since updated Scapple and my system - running a mac studio also, and Scapple is fine now.