Exactly the same problem here.

For the people that end up here from google trying to solve the problem:

Basically what you need to do is to go to the settings for the game > Manage > Browse local files, and then open the Mac folder. Then, find the .app file and right-click it, then select "Get Info". Near the top there will be a checkbox marked "Open using Rosetta".

Originally posted by Shou-Chan:

For the people that end up here from google trying to solve the problem:

Basically what you need to do is to go to the settings for the game > Manage > Browse local files, and then open the Mac folder. Then, find the .app file and right-click it, then select "Get Info". Near the top there will be a checkbox marked "Open using Rosetta".

I have the same issue as the OG.
I am running Mojave 10.14.6, there is no option to use Rosetta, nor the possibiity to install Rosetta on this OS version. Any other idea?

I'm having the same problem. I'm using Mojave on a 2016 MacBook.

Process: Boxer Standalone [1527]
Path: /Users/USER/Library/Application Support/Steam/*/Afterlife.app/Contents/MacOS/Boxer Standalone
Identifier: com.disneyinteractive.afterlife
Version: 1.0 (20151206.1)
Code Type: X86 (Native)
Parent Process: ??? [1]
Responsible: Boxer Standalone [1527]
User ID: 501

Date/Time: 2023-02-05 13:40:21.285 -0600
OS Version: Mac OS X 10.14.6 (18G103)
Report Version: 12
Anonymous UUID: 23AA450C-3E2D-ADC1-7D06-579F2DE12663


Time Awake Since Boot: 1600 seconds

System Integrity Protection: enabled

Crashed Thread: 0

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

Termination Reason: DYLD, [0x5] Code Signature

Application Specific Information:
dyld: launch, loading dependent libraries
DYLD_FALLBACK_LIBRARY_PATH=/Users/playoldgames/Library/Application Support/Steam/Steam.AppBundle/Steam/Contents/MacOS:/Users/playoldgames/Library/Application Support/Steam/steamapps/common/Afterlife:/Users/playoldgames/Library/Application Support/Steam/steamapps/common/Afterlife/bin:/usr/local/lib:/lib:/usr/lib
DYLD_INSERT_LIBRARIES=/Users/playoldgames/Library/Application Support/Steam/Steam.AppBundle/Steam/Contents/MacOS/steamloader.dylib:/Users/playoldgames/Library/Application Support/Steam/Steam.AppBundle/Steam/Contents/MacOS/gameoverlayrenderer.dylib
DYLD_LIBRARY_PATH=

Dyld Error Message:
Library not loaded: @executable_path/../Frameworks/MT32Emu.framework/Versions/A/MT32Emu
Referenced from: /Users/USER/Library/Application Support/Steam/*/Afterlife.app/Contents/MacOS/Boxer Standalone
Reason: no suitable image found. Did find:
/Users/playoldgames/Library/Application Support/Steam/steamapps/common/Afterlife/Afterlife.app/Contents/MacOS/Frameworks/MT32Emu.framework/Versions/A/MT32Emu: code signature invalid for '/Users/playoldgames/Library/Application Support/Steam/steamapps/common/Afterlife/Afterlife.app/Contents/MacOS/Frameworks/MT32Emu.framework/Versions/A/MT32Emu'

/Users/playoldgames/Library/Application Support/Steam/steamapps/common/Afterlife/Afterlife.app/Contents/MacOS/Frameworks/MT32Emu.framework/Versions/A/MT32Emu: stat() failed with errno=1
/Users/playoldgames/Library/Application Support/Steam/steamapps/common/Afterlife/Afterlife.app/Contents/MacOS/Frameworks/MT32Emu.framework/Versions/A/MT32Emu: code signature invalid for '/Users/p

Binary Images:
0x1000 - 0x306ff3 +com.disneyinteractive.afterlife (1.0 - 20151206.1) <360B3A70-0531-3E58-8D09-F98443BDDFE2> /Users/USER/Library/Application Support/Steam/*/Afterlife.app/Contents/MacOS/Boxer Standalone
0x21a0000 - 0x2205f17 +SDL (1.2.14 - 1.2.14) <FA2F2FC9-E936-DD87-FBB0-F5052D5CDAB8> /Users/USER/Library/Application Support/Steam/*/Afterlife.app/Contents/Frameworks/SDL.framework/Versions/A/SDL
0x221a000 - 0x221dff9 +net.washboardabs.SDL_sound (1.0 - 1) <55B888E9-76D5-373A-88E8-B6368590B58D> /Users/USER/Library/Application Support/Steam/*/Afterlife.app/Contents/Frameworks/SDL_sound.framework/Versions/A/SDL_sound
0x2225000 - 0x2231fff +org.dribin.dave.DDHidLib (1.1 - 1010.9.0) <CB056244-A8EC-35AE-B87F-13A120E109E3> /Users/USER/Library/Application Support/Steam/*/Afterlife.app/Contents/Frameworks/DDHidLib.framework/Versions/A/DDHidLib
0x224b000 - 0x2287e2b dyld (655.1.1) <F81222FE-3C3C-36A3-871B-0033D5DE6912> /usr/lib/dyld
0x33000000 - 0x33001fff +SDL_net (1.2.5 - 1.2.5) /Users/USER/Library/Application Support/Steam/*/Afterlife.app/Contents/Frameworks/SDL_net.framework/Versions/A/SDL_net
0x926ec000 - 0x9290fffb com.apple.audio.toolbox.AudioToolbox (1.14 - 1.14) <84E5B77C-DA78-3B30-810E-82C6E0614F95> /System/Library/Frameworks/AudioToolbox.framework/Versions/A/AudioToolbox
0x92911000 - 0x92911fff com.apple.audio.units.AudioUnit (1.14 - 1.14) <B5DDC8DB-C93A-3661-AF74-2A56BA90DE49> /System/Library/Frameworks/AudioUnit.framework/Versions/A/AudioUnit
0x92dd0000 - 0x92dd0fff com.apple.Carbon (158 - 158) <DEA0945F-C1A3-3BB6-992D-21C9735CB331> /System/Library/Frameworks/Carbon.framework/Versions/A/Carbon
0x932bf000 - 0x932bffff com.apple.Cocoa (6.11 - 23) <E7CCEBDC-16C7-38FB-B3B2-A4EB3AC191DD> /System/Library/Frameworks/Cocoa.framework/Versions/A/Cocoa
0x9462a000 - 0x9467cff7 com.apple.audio.midi.CoreMIDI (1.10 - 88) <640DB986-C02C-3E3D-B864-623F651CE7DC> /System/Library/Frameworks/CoreMIDI.framework/Versions/A/CoreMIDI
0x947e7000 - 0x947e7fff com.apple.CoreServices (946 - 946) <AF750719-0817-3886-9CD7-A0D4260B08F2> /System/Library/Frameworks/CoreServices.framework/Versions/A/CoreServices
0x95177000 - 0x95180ff7 com.apple.DiskArbitration (2.7 - 2.7) <C502C4D4-283D-37F2-AA14-55D0A12B8967> /System/Library/Frameworks/DiskArbitration.framework/Versions/A/DiskArbitration
0x95710000 - 0x957a6ffb com.apple.framework.IOKit (2.0.2 - 1483.260.4) <99680D61-77A3-3957-AD18-468AF06F292A> /System/Library/Frameworks/IOKit.framework/Versions/A/IOKit
0x9a197000 - 0x9a1a6ff3 com.apple.opengl (17.7.3 - 17.7.3) <0D6A9850-48F6-3C9D-A5CD-4CD11938D8D3> /System/Library/Frameworks/OpenGL.framework/Versions/A/OpenGL
0x9a2f2000 - 0x9a446ff7 com.apple.QTKit (7.7.3 - 3040) <489CE94F-D40A-3955-A7C2-B0F681E3A3B2> /System/Library/Frameworks/QTKit.framework/Versions/A/QTKit
0x9ad52000 - 0x9ad52fff com.apple.quartzframework (1.5 - 23) <DD8BEF1E-6DB2-3149-922D-0F22E94C48BC> /System/Library/Frameworks/Quartz.framework/Versions/A/Quartz
0x9ad53000 - 0x9afa1ff7 com.apple.QuartzCore (1.11 - 701.14) <19C565AA-BD70-30E0-B58D-43C820F7FA6C> /System/Library/Frameworks/QuartzCore.framework/Versions/A/QuartzCore
0x9b422000 - 0x9b439ff3 com.apple.ScriptingBridge (1.4 - 78) <D33A129E-AAF8-32D8-AE95-4793C2BA547F> /System/Library/Frameworks/ScriptingBridge.framework/Versions/A/ScriptingBridge
0x9d8c0000 - 0x9dd00ff7 com.apple.WebKit (14607 - 14607.3.9) <F350F4A3-04EA-3A6E-B09A-8241F911F4B5> /System/Library/Frameworks/WebKit.framework/Versions/A/WebKit
0xa61b4000 - 0xa640fff3 libicucore.A.dylib (62141.0.1) <928F0B7C-5FB0-3AEE-8377-64F23ADF1763> /usr/lib/libicucore.A.dylib

sad to say i never really found a fix besides playing it through a windows virtual machine, which works well enough i guess (depending on your machine), but still. i'm using windows now so it's not much an issue anymore, but i do wish we could find a fix for mac