[macos] Midi-in does not process program change messages when using midi port

[nikitalita]

MAME version

0.265

System information

MacOS, m2 (silicon), en_US, english

INI configuration details

#
# CORE CONFIGURATION OPTIONS
#
readconfig                1
writeconfig               0

#
# CORE SEARCH PATH OPTIONS
#
homepath                  .
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#
# CORE OUTPUT DIRECTORY OPTIONS
#
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#
# CORE RENDER OPTIONS
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# CORE INPUT OPTIONS
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#
# CORE INPUT AUTOMATIC ENABLE OPTIONS
#
paddle_device             keyboard
adstick_device            keyboard
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# CORE DEBUGGING OPTIONS
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#
# CORE MISC OPTIONS
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ramsize                   
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language                  
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noplugin                  

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# OSD ACCELERATED VIDEO OPTIONS
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#
# OSD SOUND OPTIONS
#
sound                     auto
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#
# PORTAUDIO OPTIONS
#
pa_api                    none
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#
# CoreAudio-SPECIFIC OPTIONS
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audio_output              auto
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#
# OSD MIDI OPTIONS
#
midiprovider              auto

#
# OSD EMULATED NETWORKING OPTIONS
#
networkprovider           auto

#
# BGFX POST-PROCESSING OPTIONS
#
bgfx_path                 bgfx
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bgfx_screen_chains        
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#
# SDL PERFORMANCE OPTIONS
#
sdlvideofps               0

#
# SDL VIDEO OPTIONS
#
centerh                   1
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#
# SDL KEYBOARD MAPPING
#
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#
# SDL INPUT OPTIONS
#
enable_touch              0
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#
# SDL LOW-LEVEL DRIVER OPTIONS
#
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gl_lib                    /System/Library/Frameworks/OpenGL.framework/Libraries/libGL.dylib

#
# FRONTEND COMMAND OPTIONS
#
dtd                       1

Emulated system/software

every synth that supports Program messages, teted on mu100, mu10

Incorrect behaviour

MAME processing midi input from a midi port (e.g. ./mame mu100 -midiin1 "IAC Driver Bus 1") does not process program change messages correctly on MacOS

Screen.Recording.2024-04-24.at.7.33.05.PM.mov

CC control messages seem to work, but not program change.

This doesn't seem to be limited to the mu100, this appears to be the case with all midi-enabled devices. Tested this with the mu15, CZ-1, and SD1 as well.

Loading a midi file directly with program changes in it plays fine.

I have tested this on Windows, and Windows has no problem with this.

I have double-checked to see if this was a problem with my MIDI port; using the same virtual MIDI port, I was able to use Nuked-SC55 and send program change messages just fine.

Expected behaviour

Program changes actually change the instrument in use.

Steps to reproduce

No response

Additional details

No response