Apple Releases macOS Sequoia 15.4 With Mail Categorization and More

[calvinchan.hkg]

After updating to 15.4, my M2 Max MBP has serious battery drain problem!
Anyone has same issue?

 

[calvinchan.hkg]

After upgrade to macOS 15.4

Following issues to report:

MacBook Air M1 16GB RAM and 1TB SSD,

-Installed 1Password for me even if I do not use it (had used before - ca one year ago).
-iMessage crashes every 10-15 minutes

No issues:

Mac mini M2 Pro 32GB RAM and 1TB SSD.

//Mike

I have got serious battery drain after update to 15.4. Never had this issue before.

 

[MakaiMan]

Since Upgrade to 15.4 on my iMac the icloudagent started going crazy. Even my iMacs fans came on - something that happens virtually never. Below the shot from activitymonitor. The Mac was started around 3h ago, so already the icloudmailagent accumulated 2:30h

View attachment 2498999

Same here. Did you find a solution?

Tried disable categorization, waiting 2 days, disable accounts, rebuild mail boxes, kill process... nothing works, only closing Mail app.

Need keep app Mail open bc I use a lot the "send later" function for my work. So closing it's not an provisional valuable option.

-edit-

Finally stoped. I disabled sleep mode and let the process running all night. Now it's gone. I supose it's some kind of indexation needed to run the new categorization function properly, and my 20.000 mails (aprox) stored didn't help.

 

[John Malkovich]

Logging out and then back in to iCloud solved this and sluggish startup for me.

 

[bogdanw]

"In April 2024, Microsoft uncovered a vulnerability in macOS that could allow specially crafted codes to escape the App Sandbox and run unrestricted on the system."
"After discovering this issue, we shared our findings with Apple through Coordinated Vulnerability Disclosure (CVD) via Microsoft Security Vulnerability Research (MSVR). Apple released a fix for this vulnerability, now identified as CVE-2025-31191, as part of security updates released on March 31, 2025."
https://www.microsoft.com/en-us/sec...curity-scoped-bookmarks-based-sandbox-escape/
https://support.apple.com/en-us/122373