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After installing massCode v4.1.0 and v4.2.0 (arm64) to the Applications folder on macOS 15.4.1, the following error message is shown, and the app does not open. Options are shown to 'Cancel' or 'Move to Bin'.
“massCode.app” is damaged and can’t be opened. You should move it to the Bin.
Note: I do have massCode v3.11.0 installed on my machine.
To reproduce
Download ARM version of massCode
Double-click to open the .dmg
Drag massCode icon to Applications folder icon
Run the massCode app
See error
App Version and Architecture
4.2.0 (arm64)
System info
OS: macOS 15.4.1
CPU: (10) arm64 Apple M1 Max
Memory: 175.45 MB / 64.00 GB
Shell: 5.9 - /bin/zsh
Thanks, anton. And apologies – I overlooked that Troubleshooting section.
Unfortunately I'm still not able to get massCode to open.
Option 1 (System Settings) isn't available – the app doesn't get shown in the Privacy & Security settings.
Option 2 does stop the 'damaged' error message from showing, but the app instead now opens and immediately closes.
Activity
keshav-ram-citytech commentedon Oct 15, 2025
I just downloaded it and facing the same issue.
antonreshetov commentedon Oct 15, 2025
Please see - #413, and https://github.com/massCodeIO/massCode?tab=readme-ov-file#troubleshooting
Rob-Barrett commentedon Oct 16, 2025
Thanks, anton. And apologies – I overlooked that Troubleshooting section.
Unfortunately I'm still not able to get massCode to open.
Option 1 (System Settings) isn't available – the app doesn't get shown in the Privacy & Security settings.
Option 2 does stop the 'damaged' error message from showing, but the app instead now opens and immediately closes.