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macOS Login Items / Background Agents High CPU After Update
Estimated time
10-20 min
Author & Verification
Tamem J
IT Solutions Engineer
Last verified: March 3, 2026
Runbooks and troubleshooting guides are reviewed for enterprise-safe usage and avoid security bypass patterns.
Trust Signals
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- • Enterprise Microsoft 365 Administration
- • Endpoint Management (Intune, Jamf, Kandji)
- • Identity & Access (Entra ID, Okta)
Symptoms of the trust relationship between this workstation and the primary domain failed
- Fans run loudly and CPU usage stays high after login.
- Performance degrades after macOS update or reboot.
- Activity Monitor shows one or more background processes consuming CPU.
Likely Causes of the trust relationship between this workstation and the primary domain failed
- Post-update indexing or background maintenance tasks still running.
- Login items/background agents stuck or repeatedly crashing/restarting.
- Managed security/sync clients performing heavy catch-up activity.
Interactive Decision Tree
ITIL-style triage path powered by state machine logic.
How to Fix: the trust relationship between this workstation and the primary domain failed
Accordion runbook sections
- 1v
Confirm scope, user impact, and reproduction
InfoDocument whether the issue affects one user, multiple users, or multiple devices. Confirm exact error messages, recent changes (password reset, update, network change), and whether the same issue reproduces in web vs desktop workflows where applicable.
- 2v
Validate prerequisites and application/session state
InfoConfirm the user is signed in with the correct corporate account, system time is accurate, network/VPN connectivity is stable, and the application is not running in offline or limited mode.
- 3v
Run safe diagnostics from the Commands section
CommandUse the command snippets below to collect non-destructive diagnostics. Capture output in the ticket when escalation may be required. Avoid deleting profiles, cached credentials, or managed app data unless the runbook or admin approval explicitly allows it.
- 4v
Apply safe remediation steps
Info- Capture the top processes and whether the issue subsides after 15-30 minutes.
- Use Activity Monitor to identify the specific process before changing settings.
- Do not disable endpoint security or management agents without approval.
- Escalate with process names, CPU usage, and timestamps if sustained.
- 5v
Escalate when access, policy, or security controls are involved
WarningAdmin required- Managed security/MDM/backup agent is consuming sustained CPU and needs admin review.
- Many Macs show the issue after the same macOS or agent update.
- Process crash loop or kernel-level issue is suspected.
Commands
Copyable diagnostic or remediation commands (1 snippet).
Top CPU processes (macOS)
Terminal
ps -Ao pid,pcpu,pmem,comm | sort -k2 -nr | head -15
When to Contact IT / Security
- Managed security/MDM/backup agent is consuming sustained CPU and needs admin review.
- Many Macs show the issue after the same macOS or agent update.
- Process crash loop or kernel-level issue is suspected.
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