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Fixed in 5.4.1
Votes
0
Found in
5.4.0b23
Issue ID
810964
Regression
Yes
[OSX][Editor] DllNotFoundException: libMonoPosixHelper.dylib when trying to open a serial port
Reproduction steps:
1) Open user's project
2) Open scene 'Sample'
3) Enter play mode
4) From the dropdown in the top right corner of the game view select Bluetooth...
--- DllNotFoundException: libMonoPosixHelper.dylib will be printed in the console
--- Only reproducible in the OSX editor
Regression introduced in 5.4
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jesusluvsyooh
Aug 15, 2025 18:35
This issue is back, libMonoPosixHelper.dylib is included, but the codes looking for it in wrong location. (regarding using System.IO.Compression; and DeflateStream)
Root/libMonoPosixHelper.dylib (included, but says cannot be found)
Root/Data/Managed/libMonoPosixHelper.dylib (copy it here, now it can be found)
Dedicated Server build, happens on Unity 2022, and 6000.