Fix Guide: Tahoe "Account SDD" High CPU Usage

Symptom: Your Mac fans are spinning loudly, and Activity Monitor shows a process named accountssd or accountsnd consuming 100% or more CPU.

Why this happens

This process handles iCloud account syncing. In Tahoe, it can get stuck in a "Verification Loop" if there is a sync conflict between your Mac and the Apple ID servers.

Recommended Troubleshooting Tool

Before proceeding with manual fixes, we recommend using CleanMyMac X. Quickly identify high CPU apps and optimize system memory with one click.

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Fix 1: Sign Out and In of iCloud

1. Go to System Settings > [Your Name].
2. Scroll down and click Sign Out.
3. Choose to keep a copy of data on your Mac.
4. Restart your Mac and sign back in.

Fix 2: Clear Accounts Cache

1. Open Terminal.
2. Run: rm -rf ~/Library/Accounts
3. Restart your Mac. *Note: You will need to re-enter passwords for some services.*

Recommended Tool: CleanMyMac

High CPU usage from system daemons can often be fixed by clearing "System Junk." Use CleanMyMac to clear background logs and caches that might be triggering the accountssd loop.