Kernel Panic Recovery
Symptom: Gray/black screen with “Your computer was restarted because of a problem” message, or the Mac spontaneously rebooted. Root Cause: Kernel panic — a fatal error in macOS (driver conflict, hardware issue, memory corruption, or overheating). Referred from: DIT Triage - C1 Crashed
Diagnosis
A kernel panic is unmistakable: the Mac either shows the multi-language “Your computer was restarted because of a problem” dialog, or you witness a spontaneous reboot with no user action. This is a full system crash — not just an application crash. Everything was terminated.
Fix
Recovery Sequence
Step 1: Wait for reboot (60-120 seconds)
- The Mac will restart automatically. Do not press any keys during the Apple logo boot screen.
- If FileVault is enabled, you’ll need the login password before reaching the desktop.
- If you don’t have the login password: You’re locked out until the photographer arrives. This is a shoot-stopping scenario if the photographer is not on set.
Step 2: Log in and assess
- Enter the password. Wait for the desktop to fully load (watch for menu bar items to appear).
- macOS may show a “Problem Report” dialog. Click “Ignore” or “Don’t Send” — reading the report takes time you don’t have.
Step 3: Relaunch Capture One
- Capture One will not be running after a kernel panic. Launch it manually.
- Open the session: File > Open Recent > select the session.
- Follow the full crash recovery for your workflow tier: EC - Crash Recovery Sequence
Step 4: Recover hardware connections
- The USB bus was reset. The tether cable may need to be reconnected.
- The external display may need an HDMI replug (see Step 2: Recover the display).
- The router should still be running (kernel panic only affects the laptop).
Step 5: Verify everything end-to-end
- Trigger a test capture. Verify it appears in Capture One, on the display, and on the iPad.
Total recovery: 90-180 seconds (mostly waiting for the reboot).
If Kernel Panics Happen Repeatedly
- Check for thermal issues: The Mac may be overheating. Feel the bottom of the laptop. If it’s too hot to touch, it needs airflow. Elevate it, point a fan at it, or move it to a cooler location.
- Check for USB driver conflicts: Disconnect all USB devices, reconnect one at a time. A specific device may be triggering the panic.
- Check for memory pressure: Activity Monitor > Memory tab. If the memory pressure graph is red, the system is overwhelmed. Close unnecessary applications.
- If panics continue: The laptop may have a hardware problem. Switch to a backup machine if available. Do not continue shooting on a machine that is repeatedly kernel panicking — the data integrity risk is too high.
Prevention
- Keep macOS up to date (kernel panics are often fixed in point releases)
- Avoid running the laptop in extreme heat (>35C / 95F)
- Don’t connect untested USB devices during a shoot
- Ensure adequate ventilation (don’t block vents, don’t place on soft surfaces)
- If the laptop has a history of kernel panics, bring a backup machine to the shoot