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Sliver 2.9.4 Mac Error -47
Not sure if others are also getting this issue. But on 26.1 version of the OS, when opening the application get the message :
The application “PrusaSlicer” can’t be opened.
-47
I can open the application by doing the bypass by going into the contents and opening it directly from the executable file. Assuming there is something not signed on the package as I think that is what the -47 error means.
Posted : 13/11/2025 8:50 pm
RE: Sliver 2.9.4 Mac Error -47
please report on github https://github.com/prusa3d/PrusaSlicer/issues?q=sort%3Aupdated-desc+is%3Aissue+is%3Aopen
See my GitHub and printables.com for some 3d stuff that you may like.
Posted : 14/11/2025 8:57 am
RE: Sliver 2.9.4 Mac Error -47
Happens on 2.9.5 too.
Posted : 23/05/2026 9:33 pm
RE: Sliver 2.9.4 Mac Error -47
-47 on MacOS is "file is busy".
- It can happen if you try to run it inside the DMG, did you copy to /Applications before trying to run it?
- Previous copy is still running in the background, try killing it or reboot
- Problem with the code signature, try: xattr -cr /Applications/PrusaSlicer.app
Anyway, it's not a problem with PrusaSlicer. It's on your machine.
Posted : 25/05/2026 6:51 pm