Unfortunately, the app still does not open. If I launch from the app itself, it just shuts down. If I open the app contents and run it from there I get the following in terminal.

tjl@TJs-Mac-mini ~ % /Applications/LinuxSampler/qsampler.app/Contents/MacOS/qsampler ; exit; 
This application failed to start because it could not find or load the Qt platform plugin "cocoa”.

I’m attaching the crash log as well. Both QT6 and QT5 are installed via homebrew and reside in /opt/homebrew.

Regarding being unable to build QSampler from scratch, there are libraries I can’t resolve when building for arm. I've have yet to be successful building either linuxsampler or qsampler for arm. The vet and au plugins won’t work in Rosetta as they are 32-bit so trying to build for arm is the only option unless anything can be done on your end.

TJ Lindgren

-------------------------------------
Translated Report (Full Report Below)
-------------------------------------

Process:               qsampler [47963]
Path:                  
/Applications/LinuxSampler/qsampler.app/Contents/MacOS/qsampler
Identifier:
Version:                ()
Code Type:             X86-64 (Translated)
Parent Process:        Exited process [47943]
Responsible:           Terminal [47485]
User ID:               501

Date/Time:             2026-07-03 15:46:40.3150 -0700
OS Version:            macOS 15.7.7 (24G720)
Report Version:        12
Anonymous UUID:        A30CBB7B-AFA4-9D30-3998-5694AB7623E0


Time Awake Since Boot: 1100000 seconds

System Integrity Protection: enabled

Notes:
RIP register does not match crashing frame (0x0 vs 0x7FF8A0266AE0)

Crashed Thread:        0  Dispatch queue: com.apple.main-thread

Exception Type:        EXC_CRASH (SIGABRT)
Exception Codes:       0x0000000000000000, 0x0000000000000000

Termination Reason:    Namespace SIGNAL, Code 6 Abort trap: 6
Terminating Process:   qsampler [47963]

Application Specific Information:
abort() called


Error Formulating Crash Report:
RIP register does not match crashing frame (0x0 vs 0x7FF8A0266AE0)

Thread 0 Crashed::  Dispatch queue: com.apple.main-thread
0   ???                                     0x7ff8a0266ae0 ???
1   libsystem_kernel.dylib                  0x7ff812d87846 __pthread_kill + 10
2   libsystem_pthread.dylib                 0x7ff812dc2b12 pthread_kill + 259
3   libsystem_c.dylib                       0x7ff812ce14c6 abort + 126
4   QtCore                                     0x11007e6f9 
qt_message_fatal(QtMsgType, QMessageLogContext const&, QString const&) + 9
5   QtCore                                     0x11007ffdf 
QMessageLogger::fatal(char const*, ...) const + 239
6   QtGui                                      0x10f31479a 
QGuiApplicationPrivate::createPlatformIntegration() + 5786
7   QtGui                                      0x10f3147bb 
QGuiApplicationPrivate::createEventDispatcher() + 27
8   QtCore                                     0x110292c18 
QCoreApplication::init() + 344
9   QtCore                                     0x110292a97 
QCoreApplication::QCoreApplication(QCoreApplicationPrivate&) + 39
10  QtGui                                      0x10f311ace 
QGuiApplication::QGuiApplication(QGuiApplicationPrivate&) + 14
11  QtWidgets                                  0x10e3f326e 
QApplication::QApplication(int&, char**, int) + 206
12  qsampler                                   0x104f4159e 
qsamplerApplication::qsamplerApplication(int&, char**) + 30
13  qsampler                                   0x104f42c32 main + 50
14  qsampler                                   0x104f3e614 start + 52

Thread 1:: com.apple.rosetta.exceptionserver
0   runtime                                 0x7ff7ffc770e4 0x7ff7ffc73000 + 
16612

Thread 2:
0   runtime                                 0x7ff7ffc959b0 0x7ff7ffc73000 + 
141744

Thread 3:
0   runtime                                 0x7ff7ffc959b0 0x7ff7ffc73000 + 
141744

Thread 4:
0   runtime                                 0x7ff7ffc959b0 0x7ff7ffc73000 + 
141744


Thread 0 crashed with X86 Thread State (64-bit):
  rax: 0x0000000000000000  rbx: 0x00007ff8549cf9c0  rcx: 0x0000000000000000  
rdx: 0x0000000000000000
  rdi: 0x0000000000000043  rsi: 0x00000002052b8200  rbp: 0x0000000000000000  
rsp: 0x00007ff8547c4e40
   r8: 0x000000030e23fee8   r9: 0x0000000000000000  r10: 0x00007ff8549cf9c0  
r11: 0x0000000000000000
  r12: 0x0000000000000043  r13: 0x0000000110369d10  r14: 0x0000000000000103  
r15: 0x0000000000000016
  rip: <unavailable>       rfl: 0x0000000000000287
 tmp0: 0xffffffffffffffff tmp1: 0x00007ff8a0266ab4 tmp2: 0x00007ff812d8783c


Binary Images:
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<8d7a2378-0c9a-3c22-bf24-79ab3cf6d207> /usr/lib/dyld
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       0x10dd02000 -        0x10dddefff libgig.13.dylib (*) 
<1fa7d625-aabe-32cb-b8c9-428ab305de02> /usr/local/lib/libgig.13.dylib
               0x0 - 0xffffffffffffffff ??? (*) 
<00000000-0000-0000-0000-000000000000> ???
    0x7ff812d80000 -     0x7ff812dbcb1f libsystem_kernel.dylib (*) 
<a1b690f6-953c-34b8-91cc-860786ff5fa1> /usr/lib/system/libsystem_kernel.dylib
    0x7ff812dbd000 -     0x7ff812dc8fd7 libsystem_pthread.dylib (*) 
<fa0539b0-b910-38ec-9406-18f7fb96ab75> /usr/lib/system/libsystem_pthread.dylib
    0x7ff812c61000 -     0x7ff812ce9a57 libsystem_c.dylib (*) 
<2727df96-e5e9-302e-8ea3-766931b52ca1> /usr/lib/system/libsystem_c.dylib

External Modification Summary:
  Calls made by other processes targeting this process:
    task_for_pid: 0
    thread_create: 0
    thread_set_state: 0
  Calls made by this process:
    task_for_pid: 0
    thread_create: 0
    thread_set_state: 0
  Calls made by all processes on this machine:
    task_for_pid: 0
    thread_create: 0
    thread_set_state: 0

VM Region Summary:
ReadOnly portion of Libraries: Total=486.6M resident=0K(0%) 
swapped_out_or_unallocated=486.6M(100%)
Writable regions: Total=983.9M written=1410K(0%) resident=1410K(0%) 
swapped_out=0K(0%) unallocated=982.5M(100%)

                                VIRTUAL   REGION
REGION TYPE                        SIZE    COUNT (non-coalesced)
===========                     =======  =======
Activity Tracing                   256K        1
Kernel Alloc Once                    8K        1
MALLOC                           813.2M       21
MALLOC guard page                   96K        6
Rosetta Arena                     4096K        2
Rosetta Generic                   1088K      269
Rosetta IndirectBranch             192K        2
Rosetta JIT                      128.0M        1
Rosetta Return Stack                80K        8
Rosetta Thread Context              80K        8
STACK GUARD                         12K        3
Stack                             9772K        4
Stack Guard                       56.0M        1
VM_ALLOCATE                        220K        8
VM_ALLOCATE (reserved)              24K        3         reserved VM address 
space (unallocated)
__DATA                            6579K      361
__DATA_CONST                      38.7M      369
__DATA_DIRTY                       642K      110
__FONT_DATA                        2352        1
__LINKEDIT                       166.3M       14
__OBJC_RO                         61.3M        1
__OBJC_RW                         2394K        1
__TEXT                           320.4M      391
__TPRO_CONST                         8K        2
mapped file                       61.0M       34
page table in kernel              1410K        1
shared memory                     1168K        8
===========                     =======  =======
TOTAL                              1.6G     1631
TOTAL, minus reserved VM space     1.6G     1631



-----------
Full Report
-----------

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Thunderbolt Device: Thunderbolt 5 Hub, Other World Computing, 1, 56.1


On Jul 3, 2026, at 1:20 PM, Christian Schoenebeck <[email protected]> wrote:

On Saturday, 27 June 2026 01:10:30 CEST TJ Lindgren wrote:
Running the latest snapshot of Linuxsampler for macOS dated 2026-06-22, when
launching Qsampler it cannot find the QtSvg framework.

Termination Reason:    Namespace DYLD, Code 1 Library missing
Library not loaded: QtSvg.framework/Versions/5/QtSvg
Referenced from: <C874D53C-665D-33A0-8651-EAAADCE84EFC>
/Applications/LinuxSampler/qsampler.app/Contents/MacOS/qsampler Reason:
tried: 'QtSvg.framework/Versions/5/QtSvg' (no such file),
'/System/Volumes/Preboot/Cryptexes/OSQtSvg.framework/Versions/5/QtSvg' (no
such file), 'QtSvg.framework/Versions/5/QtSvg' (no such file),
'/Library/Frameworks/QtSvg.framework/Versions/5/QtSvg' (no such file),
'/System/Library/Frameworks/QtSvg.framework/Versions/5/QtSvg' (no such
file, not in dyld cache) (terminated at launch; ignore backtrace)

If you open the QSampler Package Contents, the file in question is located
in
/Applications/LinuxSampler/qsampler.app/Contents/Frameworks/QtSvg.framework
/Versions/5/QtSvg with an alias in
/Applications/LinuxSampler/qsampler.app/Contents/Frameworks/QtSvg.framework
/QtSvg however the app is not looking for the library in either of those
places.

A bunch of references were wrong, which I just fixed now in our Mac build
script:

https://svn.linuxsampler.org/cgi-bin/viewvc.cgi/misc/trunk/mac_package_builder/make-qsampler-app.sh?revision=4624&view=markup

I think the references look OK now:

otool -L components/qsampler.pkg/LinuxSampler/qsampler.app/Contents/MacOS/qsampler 
components/qsampler.pkg/LinuxSampler/qsampler.app/Contents/MacOS/qsampler:
       @rpath/QtSvg.framework/Versions/5/QtSvg (compatibility version 5.4.0, current version 5.4.2)
       @rpath/QtNetwork.framework/Versions/5/QtNetwork (compatibility version 5.4.0, current version 5.4.2)
       @rpath/QtWidgets.framework/Versions/5/QtWidgets (compatibility version 5.4.0, current version 5.4.2)
       @rpath/QtGui.framework/Versions/5/QtGui (compatibility version 5.4.0, current version 5.4.2)
       /System/Library/Frameworks/OpenGL.framework/Versions/A/OpenGL (compatibility version 1.0.0, current version 1.0.0)
       /System/Library/Frameworks/AGL.framework/Versions/A/AGL (compatibility version 1.0.0, current version 1.0.0)
       @rpath/QtCore.framework/Versions/5/QtCore (compatibility version 5.4.0, current version 5.4.2)
       @executable_path/../Resources/liblscp.6.dylib (compatibility version 6.0.0, current version 6.0.6)
       /usr/local/lib/libgig.13.dylib (compatibility version 14.0.0, current version 14.0.0)
       /usr/lib/libc++.1.dylib (compatibility version 1.0.0, current version 28.1.0)
       /usr/lib/libSystem.B.dylib (compatibility version 1.0.0, current version 159.1.0)

So please re-download and try again.

I tried building from source but it does not seem to play nice at all.

What was the problem?

/Christian




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