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Codex desktop app high CPU and rapid memory growth on startup (macOS) #11161
Description
What version of the Codex App are you using (From “About Codex” dialog)?
Version 260208.1016 (571)
What subscription do you have?
plus
What issue are you seeing?
The CPU of the Mac has significantly increased, and Codex has crashed.
What steps can reproduce the bug?
Execute: npx skills add openclaw/openclaw
Open code X
Observe that the CPU usage in the activity monitor is 90%, and finally the codex exits.
What is the expected behavior?
The codex is operating stably.
Additional information
No response
Activity
Skies-syx commentedon Feb 9, 2026
The following is the conclusion obtained through the troubleshooting process using VSCode Codex.
Subject: Codex desktop app high CPU and rapid memory growth on startup (macOS)
Hi team,
I’m seeing persistent high CPU usage when launching Codex desktop.
Environment:
Symptoms:
/Applications/Codex.app/Contents/MacOS/Codex(notcodex app-server).[desktop-notifications] service starting.ResizeObserver loop completed with undelivered notifications.What I already tried:
Diagnostic package attached:
/tmp/codex_diagnostic_20260209-162414.zipPlease help investigate startup rendering/notification loop behavior and memory growth.
Thanks.
codex_diagnostic_20260209-162414.zip
[-]After local installation of npx skills, starting codex causes the CPU to spike by 100%.[/-][+]Codex desktop app high CPU and rapid memory growth on startup (macOS)[/+]garethmcnicol-lendingcrowd commentedon Feb 9, 2026
This app is useless. 'It doesn't work on Mac Silicon, known issue' [has only been released for macos]
Do better, guys. Don't give us AI Slop and call it groundbreaking; it's a bad look for you. You need to do some actual QA testing for this kind of slop.
Skies-syx commentedon Feb 9, 2026
I tried many methods but failed to escape this case
etraut-openai commentedon Feb 14, 2026
We've made many improvements to memory usage and performance over the past week. Are you still seeing this problem with the latest version of the app?
maronk commentedon Feb 17, 2026
Can confirm same issue here MacBook M4 Pro with 48GB RAM - app is slow and very unresponsive / lagging when clicking, switching threads, runs high cpu and keeps spinning my fans which are seldomly heard otherwise.