This browser is no longer supported.
Upgrade to Microsoft Edge to take advantage of the latest features, security updates, and technical support.
![](data:image/svg+xml, %3Csvg xmlns='http://www.w3.org/2000/svg' height='64' class='font-weight-bold' style='font: 600 30.11764705882353px "SegoeUI", Arial' width='64'%3E%3Ccircle fill='hsl(128, 8%, 22%)' cx='32' cy='32' r='32' /%3E%3Ctext x='50%25' y='55%25' dominant-baseline='middle' text-anchor='middle' fill='%23FFF' %3EA%3C/text%3E%3C/svg%3E)
I have been trying to open Outlook on my MacBook Pro all day, and it has consistently crashed. I was just using Outlook last night and had not made any changes to apps or settings since trying to open Outlook this morning. MacBook is running Sonoma 14.3.1. Never any issues until now. Consistent error messages....even after uninstalling and re-installing...per Microsoft support which was not very helpful.
Below is the most recent message I received (minus hundreds of lines due to character limits).
Microsoft Error Reporting log version: 2.0
Error Signature:
Exception: EXC_CRASH (SIGTRAP)
ExceptionEnumString: 50331648
Exception Code: 0x00000001 (0x0000000000000000)
Date/Time: 2024-03-19 22:11:55 +0000
Application Name: Microsoft Outlook
Application Bundle ID: com.microsoft.Outlook
Application Signature: OPIM
Application Bitness: x64
Application Version: 16.83.1.24031813
Crashed Module Name: merp
Crashed Module Version: 16.83.24031813
Crashed Module Offset: 0x000000000000559c
Blame Module Name: Microsoft Outlook
Blame Module Version: 16.83.24031813
UnsymbolicatedChecksum: DCA9BCB06082872F879C6092737B3813
Blame Module Offset: 0x0000000000034334
StackHash: 3334bf3e6cfb5dc_50331648_main_phx_arm
Application LCID: 1033
Extra app info: Reg=en Loc=0x0409
Build Type: Release
Crashed thread Stack Pointer: 0x_000000016afdd9d0
Crashed thread: 0
uncaught ObjC exception, reason: The window has been marked as needing another Update Constraints in Window pass, but it has already had more Update Constraints in Window passes than there are views in the window.
<OLToolbarValidatingWindow: 0x12505d640> 0x282 (642) {{0, 89}, {1696, 990}} en
OS Information
Operating System: Mac OS X 14.3.1 (Build 23D60)
CPU: ARM64e, Logical CPU Count: 12
Physical Memory: 16384 MB
Device_model: Mac14,10
Screen: 1728.000000 x 1117.000000, bitsPerPixel = 24, frame = 0.000000, 0.000000, 1728.000000, 1117.000000
CrashedApp_Virtual_Memory_Size_MB: 406330.625000
CrashedApp_Resident_Memory_Size_MB: 456.703125
CrashedApp_Memory_Footprint_MB: 158.661926
ErrorReportingDeviceUUID: 483A116B-B39F-5CBD-82C1-D981E3B9C0DA
ErrorReportingUUID: 44C40BF0-BDD8-402C-A229-42DB172A9594
ULS UUID: EA80B636-3297-4FFC-A9B9-B49947795BF0
CrashedLogSessionId: EA80B636-3297-4FFC-A9B9-B49947795BF0
TimeFromLaunch: 0 hours, 0 minutes, 5 seconds
CrashedSessionDuration: 5
Total errors on this client: 210
Microsoft Application Information:
SHSuffixKey_1: _arm
AudienceChannel: CC
Audience: Production
SHSuffixKey_0: _phx
PreviewEnabled: true
AudienceGroup: Production
Using older versions of Outlook for Mac in business environments
Locked Question. This question was migrated from the Microsoft Support Community. You can vote on whether it's helpful, but you can't add comments or replies or follow the question.
I am having the same issue, but if I quit outlook or shut down my Mac I have to create a new profile. Every time I make a new profile I have to remake my signatures. There are 2 Mac's at work here and mine is the only one with the issue.
Been having the same issue since this morning -- Outlook for Mac suddenly started freezing and crashing.
Thank you, Shannah, for teaching me something new. I was able to set up a new Outlook profile, which enabled me to get Outlook to stay open long enough to switch to Legacy Mode. The new profile alone did not fix the issue. Legacy Mode seems to be the solution. No problems since switching.
The new profile and switching to Legacy Mode seems to have fixed the symptom of a bigger problem. Do you know what the root issue is that was causing Outlook to crash? Curious since nothing on my end changed prior to when the crashes started happening this morning.
Hello Wendy, Thank you for posting to Microsoft Community. I understand that you have an issue where the Outlook app for Mac is crashing on startup. My apologies for the inconvenience that this is causing you. Based on the error description, could you kindly try setting up your account in a new Outlook profile and see if issue persists: For reference: Manage profiles or identities in Outlook for Mac - https://support.microsoft.com/en-us/office/manage-profiles-or-identities-in-outlook-for-mac-fed2a955-74df-4a24-bef6-78a426958c4c
Microsoft Support (Do not delete the current profile as yet to prevent any data loss).
If the issue persists, you may have to uninstall and re-install the outlook app. Please refer to steps below. (Please backup the outlook folders before moving to trash). In Finder >go to the Applications folder Drag/Move the Microsoft Outlook app to the trash. Restart your Mac. Run this installer to reinstall Microsoft Outlook Install package.
I hope this helps.
Sincerely, Shannah.