Works in Editor, not in Builds

[dbitkowski]

I've successfully got HIDUE to work in the Editor. I can initialize, open, and read my hid device just fine. However, when I make a build (tried Development, Debug, and Shipment build), it can no longer open the device.

Unreal 5.3.1
MacOS Ventura

I did try to do a hid_error, which returns just "h" for the error (not sure what that means)

[microdee]

interesting, did you manage to get the editor functionality working on MacOS? What did you need to change?
Sorry I thought this was the SpaceMouse repo, did you use this in your own plugin?

[dbitkowski]

I copied the HIDUE plugin into the Plugins directory of my Unreal project, which brought it into the project. I did not see the SpaceMouse repo.

The build is able to do things like hid_init(); so there is a link to the plugin there in the build, but when I call hid_open, in editor, it works, I can hid_read and everything, get information back, but as soon as I try to run the build, it does not return a handle to a working device with hid_open.

[dbitkowski]

Ok, so after debugging the issue further, it seems that on Mac, I'm receiving a kIOReturnNotPermitted error on builds.

[dbitkowski]

I've finally resolved this issue. On MacOS, I needed to sign the build with an entitlements file that included com.apple.security.device.usb = true
Without this, I was getting Not Permitted errors.

[microdee]

@dbitkowski very good find! maybe that's the issue with my plugin as well where I use this. Do you know if adding this "entitlements file" is controllable via the plugin? like how UPL can control OS specific package metadata for mobile platforms?

[dbitkowski]

@microdee I haven't tried adding the entitlements through Unreal or through the Plugin yet. Right now, I just run a manual process after making the build.

codesign --deep -f -v -s "Developer ID Application: My Company (My Company Apple ID)" --entitlements "MyApp.entitlements" "MyApp.app"

And the entitlements file looks something like this:

<!DOCTYPE plist PUBLIC "-//Apple//DTD PLIST 1.0//EN" "http://www.apple.com/DTDs/PropertyList-1.0.dtd">
<plist version="1.0">
    <dict>
	       <key>com.apple.security.cs.disable-library-validation</key>
	       <true/>
	       <key>com.apple.security.cs.disable-executable-page-protection</key>
	       <true/>
	       <key>com.apple.security.device.usb</key>
	       <true/>
    </dict>
</plist>```