MacOS 26.1. - Aerospace cannot be started

[denisvanmorgan]

Body

Steps to reproduce:

1. Run aerospace on MacOS 26.1.
2. Try to start it

Expected result: Aerospace is running and working
Actual result: Aerospace does not even leave a log trace. It's like it was never started. You can start it as much as so you want but it seems to be non responsive like MacOS cannot open the app.

[LiYaoYu]

Same issue here, and there's a runtime error shown as popup with content below.
Not sure if it related but for "Displays have separate spaces: false", I do enable that in the system configuration.

AeroSpace Runtime Error

Please report to:
https://github.com/nikitabobko/AeroSpace/discussions/categories/potential-bugs
Please describe what you did to trigger this error

Message:
Version: 0.19.2-Beta
Git hash: d246f25
refreshSessionEvent: nil
Date: 2025-11-15 16:14:55 +0000
Thread name:
Is main thread: true
axTaskLocalAppThreadToken: nil
macOS version: Version 26.1 (Build 25B78)
Coordinate: AppBundle/initAppBundle.swift:15:14 initAppBundle()
recursionDetectorDuringTermination: false
cli: false
Monitor count: 1
Displays have separate spaces: false

Stacktrace:
0 AeroSpace 0x00000001028257dc $s6Common4dieT_4file4line6column8functionxSS_SSS2iSStlFs5NeverO_Tg5 + 2260
1 AeroSpace 0x0000000102855c94 $s6Common5check__4file4line6column8functionySb_SSyXKSSS2iSStF + 92
2 AeroSpace 0x0000000102690028 $s9AppBundle04initaB0yyF + 488
3 AeroSpace 0x000000010262da10 $s9AeroSpace0aB3AppV7SwiftUI0C0AadEPxycfCTW + 20
4 SwiftUI 0x00000001c395cd44 $s7SwiftUI3AppPAAE4mainyyFZ + 208
5 AeroSpace 0x000000010262da50 main + 36
6 dyld 0x000000018f2d9d54 start + 7184

[he-linyun]

Update: this issue was solved with the 0.20.0-Beta update!

---

Original reply:

Same issue here. When I restart the machine, aerospace could be found in the Activity Monitor but is not working. If I force quit aerospace, it can never start.

Tried reinstalling aerospace but it does not work.

[hunterkepley]

This was not fixed for me personally on the 0.20.0-Beta semver - its only usable on my other macs because im on an older version on those - just incase the maintainer sees this and thinks it's fixed 🙂

[bevanmw]

I've got the same issue with 0.20.0-Beta: no crash logs, no process in activity monitor.

I'm on macOS Tahoe 26.1 (25B78)

[hunterkepley]

Im having the same issue, it does not happen on older versions of Aerospace it seems, as my mac mini and old mbp (just got a new one today and installed Aerospace) are still working fine with it

If you run aerospace and point it to a config file, you will get the crash report:

##### AeroSpace Runtime Error #####

Please report to:
    https://github.com/nikitabobko/AeroSpace/discussions/categories/potential-bugs
    Please describe what you did to trigger this error

Message: 
Version: 0.20.0-Beta
Git hash: 1ec4234a25091225ca2442c2d37e45432dd1b347
refreshSessionEvent: nil
Date: 2025-12-06 06:14:10 +0000
Thread name: 
Is main thread: true
axTaskLocalAppThreadToken: nil
macOS version: Version 26.0 (Build 25A8353)
Coordinate: AppBundle/Config.swift:8:10 getDefaultConfigUrlFromProject()
recursionDetectorDuringTermination: false
cli: false
Monitor count: 1
Displays have separate spaces: true

Stacktrace:
0   AeroSpace                           0x00000001049d15cc $s6Common4dieT_4file4line6column8functionxSS_SSS2iSStlFs5NeverO_Tg5 + 2036
1   AeroSpace                           0x0000000104a393b0 $s6Common5check__4file4line6column8functionySb_SSyXKSSS2iSStF + 92
2   AeroSpace                           0x00000001048310f8 $s9AppBundle30getDefaultConfigUrlFromProject10Foundation3URLVyF + 532
3   AeroSpace                           0x0000000104831450 $s9AppBundle16defaultConfigUrl10Foundation3URLVvg + 468
4   AeroSpace                           0x0000000104831538 $s9AppBundle13defaultConfigAA0D0VvpfiADyXEfU_ + 104
5   AeroSpace                           0x00000001048314ac $s9AppBundle13defaultConfig_WZ + 24
6   libdispatch.dylib                   0x0000000191d2aac4 _dispatch_client_callout + 16
7   libdispatch.dylib                   0x0000000191d13a60 _dispatch_once_callout + 32
8   AeroSpace                           0x0000000104831798 $s9AppBundle6config_WZ + 124
9   libdispatch.dylib                   0x0000000191d2aac4 _dispatch_client_callout + 16
10  libdispatch.dylib                   0x0000000191d13a60 _dispatch_once_callout + 32
11  AeroSpace                           0x0000000104826998 $s9AppBundle12reloadConfig4args05forceD3Url6stdoutSb6Common06ReloadD7CmdArgsV_10Foundation3URLVSgSSztYaKFTY0_ + 768
12  AeroSpace                           0x0000000104826ed9 $s9AppBundle12reloadConfig05forceD3UrlSb10Foundation3URLVSg_tYaKFTQ1_ + 1
13  AeroSpace                           0x0000000104856fb1 $s9AppBundle04initaB0yyFyyYaKcfU_TQ1_ + 1
14  AeroSpace                           0x00000001047f84d5 $s9AppBundle14GlobalObserverO7onNotif33_F1205CFDC13498282252A689C79131F6LLyy10Foundation12NotificationVFZyyYaYbScMYccfU_TATQ0_ + 1
15  libswift_Concurrency.dylib          0x000000028a661dfd _ZL23completeTaskWithClosurePN5swift12AsyncContextEPNS_10SwiftErrorE + 1

When I launch it otherwise, sometimes it launches, most of the time not, and even when it does it only uses default settings and ignores my config file (of which, is default at the moment besides gaps changes because i havent been able to customize anything)

[hunterkepley]

Workaround for me : using an older version works fine (0.19.2 i think is what i landed on), which is what i have on my other macs

[hunterkepley]

This stopped working after I updated my MacOS version :/

New error when launching:

##### AeroSpace Runtime Error #####

Please report to:
    https://github.com/nikitabobko/AeroSpace/discussions/categories/potential-bugs
    Please describe what you did to trigger this error

Message: 
Version: 0.19.2-Beta
Git hash: d246f250468fc9d427a2eb901d56794af7ac6609
refreshSessionEvent: nil
Date: 2025-12-07 16:28:59 +0000
Thread name: 
Is main thread: true
axTaskLocalAppThreadToken: nil
macOS version: Version 26.1 (Build 25B78)
Coordinate: AppBundle/Config.swift:7:10 getDefaultConfigUrlFromProject()
recursionDetectorDuringTermination: false
cli: false
Monitor count: 1
Displays have separate spaces: false

Stacktrace:
0   AeroSpace                           0x0000000104ff97dc $s6Common4dieT_4file4line6column8functionxSS_SSS2iSStlFs5NeverO_Tg5 + 2260
1   AeroSpace                           0x0000000105029c94 $s6Common5check__4file4line6column8functionySb_SSyXKSSS2iSStF + 92
2   AeroSpace                           0x0000000104e40238 $s9AppBundle30getDefaultConfigUrlFromProject10Foundation3URLVyF + 528
3   AeroSpace                           0x0000000104e4058c $s9AppBundle16defaultConfigUrl10Foundation3URLVvg + 464
4   AeroSpace                           0x0000000104e40674 $s9AppBundle13defaultConfigAA0D0VvpfiADyXEfU_ + 104
5   AeroSpace                           0x0000000104e405e8 $s9AppBundle13defaultConfig_WZ + 24
6   libdispatch.dylib                   0x0000000194666ac4 _dispatch_client_callout + 16
7   libdispatch.dylib                   0x000000019464fa60 _dispatch_once_callout + 32
8   AeroSpace                           0x0000000104e408cc $s9AppBundle6config_WZ + 120
9   libdispatch.dylib                   0x0000000194666ac4 _dispatch_client_callout + 16
10  libdispatch.dylib                   0x000000019464fa60 _dispatch_once_callout + 32
11  AeroSpace                           0x0000000104e369d0 $s9AppBundle12reloadConfig4args05forceD3Url6stdoutSb6Common06ReloadD7CmdArgsV_10Foundation3URLVSgSSztFTf4xnn_n + 672
12  AeroSpace                           0x0000000104e63f64 $s9AppBundle04initaB0yyF + 292
13  AeroSpace                           0x0000000104e01a10 $s9AeroSpace0aB3AppV7SwiftUI0C0AadEPxycfCTW + 20
14  SwiftUI                             0x00000001c8ac4d44 $s7SwiftUI3AppPAAE4mainyyFZ + 208
15  AeroSpace                           0x0000000104e01a50 main + 36
16  dyld                                0x0000000194441d54 start + 7184