mac mail crashes or runs very slow and then crashes sequoia 15.6

New issue or old issue ?

Is there a time-line as to when this occurred visa vie, only after updating to Sequoia 15.6 and not before ?

To avoid a game of 20 questions  

Download the Application Etrecheck  ( External Link ) directly from the Developer.

This is a Diagnostic Tool that makes no changes to the computer.

It makes a coherent and readable inventory of both the Hardware and Software used on the computer 

The application is free or paid for added features. 

The Report will Not Reveal Any Personal Information. 

Post back the Full Report - Share Report >> Copy , then  paste  >>>> using the Additional Text Icon  <<<<

Thank you again and good morning

Have you tried launching Mail in a Safe Launch  of the application

With Mail closed, hold the Shift key and try to launch Mail 

It should allow Mail to boot in the last workable state 

From the report.

There is some concerns about the amount of Empty Space available for the operating system to function without showdown of applications like Mail 

General guidelines are usually 15% to 20% of the total drive capacity to be kept as Empty Space 

Drives:

disk0 - APPLE SSD AP0512N 500.28 GB (Solid State - TRIM: Yes)

Size: 499.96 GB

Free: 98.15 GB

Available: 111.72 GB

Credit to fellow contributor @ etresoft  and developer of the Etrecheck application

Quote >>  “ The "available" storage is the amount of used storage that the operating system could automatically delete if it felt that it was really necessary.

The "free" storage is the amount that you can actually use for something.

There are system processes that run in the background and automatically delete some of the "available" storage and convert it to "free". If you completely run out of storage, then those system processes will try a little harder. When you "delete" files you are just hinting to the operating system that you don't need those files anymore. The operating system will eventually remove them, but on its own schedule.

Certain tools will allow you to force the issue and manually clean up some of this storage and manually delete local snapshots. But that is only temporary. "  << End Quote 

You may what to remove Skype as Microsoft Windows has Closed Down that service 

[Not Loaded] com.skype.skype.shareagent.plist (Not signed - installed 2019-02-26)

2025-08-10 18:42:54 Mail.app - Hang (3 times)

        First occurrence: 2025-08-10 17:08:37

        Executable: /System/Applications/Mail.app

We shall keep our eyes open for the report

Thank you

We will back to you as some as we are able to.

Marten Benatar wrote:

Good morning. Did you get a chance to look at the log?

Yes and above reply are the finding from the Etrecheck Report