Fragment of Motion 5.6.2 heaviest stack trace from spindump taken during beachball hang when 
executing Suzero .motn file

System: 128GB M1 Ultra Mac Studio, 64-core GPU, 8TB SSD, Monterey 12.5

640   -[NSTableView drawRowIndexes:clipRect:] + 660 (AppKit + 3029900) [0x18c330b8c]
640   -[OZLayerListOutlineView drawRow:clipRect:] + 320 (Ozone + 5080976) [0x104294790]
640   -[NSTableView drawRow:clipRect:] + 1436 (AppKit + 3032184) [0x18c331478]
638   -[NSOutlineView _drawContentsAtRow:column:withCellFrame:] + 64 (AppKit + 3718976) [0x18c3d8f40]
638   -[NSTableView _drawContentsAtRow:column:withCellFrame:] + 76 (AppKit + 3033116) [0x18c33181c]
638   -[NSOutlineView preparedCellAtColumn:row:] + 60 (AppKit + 3719144) [0x18c3d8fe8]
638   -[NSTableView preparedCellAtColumn:row:] + 448 (AppKit + 3033856) [0x18c331b00]
638   -[OZLayerListModule outlineView:objectValueForTableColumn:byItem:] + 300 (Ozone + 1077796) [0x103ec3224]
638   -[OZLayerNodeWrapper nodeImage] + 136 (Ozone + 5093304) [0x1042977b8]
638   -[OZListNodeRenderer imageFor:atTime:scene:view:] + 588 (Ozone + 2772804) [0x104060f44]
634   OZElement::getBounds(PCRect<double>*, OZRenderState const&) + 44 (Ozone + 592184) [0x103e4c938]
633   OZGroup::getImageBoundsWithEffectsAndCrop(PCRect<double>*, OZRenderState const&) + 120 (Ozone + 865020) [0x103e8f2fc]
633   OZGroup::getOriginalBounds(PCRect<double>*, OZRenderState const&) + 760 (Ozone + 863596) [0x103e8ed6c]
633   non-virtual thunk to PSEmitter::getProjectedBounds(PCRect<double>*, PCMatrix44Tmpl<double> const&, OZRenderState const&) + 16 (Particles + 30224) [0x109733610]
633   PSEmitter::getProjectedBounds(PCRect<double>*, PCMatrix44Tmpl<double> const&, OZRenderState const&) + 156 (Particles + 28424) [0x109732f08]
633   PSEmitter::getRenderBounds(PCRect<double>*, OZRenderParams&, PCMatrix44Tmpl<double> const&) + 472 (Particles + 29632) [0x1097333c0]
633   OZLockingGroup::WriteSentry::WriteSentry(OZLockingGroup*) + 32 (Ozone + 3051372) [0x1040a4f6c]
633   OZLockingGroup::acquireLocks() + 128 (Ozone + 3050320) [0x1040a4b50]
633   PCSharedMutex::lock() + 152 (ProCore + 669988) [0x103c6b924]
633   std::__1::this_thread::sleep_for(std::__1::chrono::duration<long long, std::__1::ratio<1l, 1000000000l> > const&) + 84 (libc++.1.dylib + 105208) [0x1893b7af8]
628   __semwait_signal + 8 (libsystem_kernel.dylib + 20588) [0x18942206c]
*613   ??? (kernel.release.t6000 + 612016) [0xfffffe00079456b0]
*12    ??? (kernel.release.t6000 + 612016) [0xfffffe00079456b0] (runnable)
*3     ??? (kernel.release.t6000 + 69240) [0xfffffe00078c0e78]
*2     ??? (kernel.release.t6000 + 69240) [0xfffffe00078c0e78] (running)