Does LockDown Browser Work on macOS Tahoe 26? (Status + Workarounds 2026)
Quick compatibility status
| LDB version | macOS Tahoe 26.0 | macOS Tahoe 26.1 | M4 Pro / Max |
|---|---|---|---|
| 2.1.5.01 (current) | Partial | Partial | Partial - 8-15s slow init |
| 2.1.5.00 | ✗ Not supported | ✗ | ✗ |
| 2.1.4 and earlier | ✗ | ✗ | ✗ |
Issue 1 - Webcam check loop on Tahoe 26.0 and 26.1
Symptom: The Respondus Monitor webcam check spins for 30+ seconds longer than on Sequoia, sometimes timing out entirely. Reproduced on both M3 Pro and M4 Max.
Workaround:
- Open System Settings → Privacy & Security → Camera.
- Toggle LockDown Browser off.
- Quit LDB.
- Re-toggle Camera permission for LDB to on.
- Relaunch LDB. The webcam check completes in normal time on the second attempt.
This is a TCC state inconsistency in Tahoe 26.0/26.1 specifically. Apple has acknowledged similar issues in their release notes for 26.2 (forthcoming).
Issue 2 - Screen Recording permission re-prompts every launch
Symptom: Tahoe 26 introduced stricter Screen Recording renewal. LDB shows the consent dialog at the start of every exam launch even after granting permission. Annoying but functional - click Allow.
Mitigation: Launch LDB at least 24 hours before your exam to handle the prompt outside the exam window. The permission grant is fresh for the next 30 days. See the dedicated screen recording page.
Issue 3 - Slow initialization on M4 Pro and M4 Max
Symptom: 8-15 second longer launch time on M4 Pro and Max chips on Tahoe 26 specifically. M4 base chip not affected. The slowdown is in the WebKit-WebView initialization phase before the exam UI renders.
Workaround:
- Be patient - the slow init is a one-time cost per launch, not per-question.
- Allow extra time for the pre-exam phase: instead of launching 5 minutes before exam start, launch 15 minutes before.
- If your exam is <30 minutes long, consider taking it on a different Mac (any non-M4-Pro/Max) until LDB 2.1.6 ships.
Respondus is tracking this issue. Fix expected in LDB 2.1.6 (target Q3 2026 per their support team).
What Respondus officially says
Respondus published an advisory KB acknowledging Tahoe 26 partial compatibility with LDB 2.1.5.01. The advisory recommends upgrading to 2.1.5.01 (skipping 2.1.5.00 which doesn't support Tahoe at all) and accepting the three known issues until 2.1.6.
Several universities (notably Rutgers, where Canvas service published a specific Tahoe advisory in September 2025) have advised students to delay Tahoe upgrade or use a non-Tahoe Mac during the spring 2026 exam window.
Should you upgrade to Tahoe before exam season ends?
Recommendation: no. Three known issues + the 30-day Screen Recording re-prompt + the slow M4 Pro/Max init = avoidable risk during exam season. Wait for LDB 2.1.6 (expected Q3 2026) which addresses all three.
If you've already upgraded to Tahoe
- Verify your LDB is 2.1.5.01 (right-click LDB.app → Get Info → Version).
- If older, uninstall (uninstall cluster) and reinstall from your LMS.
- Run the practice exam your instructor enabled to confirm the system check completes.
- Apply the workaround procedures above for the three known issues.
- Email your instructor before exam day if any persist.
Frequently asked questions
Should I downgrade from Tahoe back to Sequoia?
macOS major-version downgrades require a clean reinstall of the OS - significant work. The workarounds in LDB 2.1.5.01 are usable; downgrade is excessive unless exams are repeatedly failing.
Will Respondus deliver 2.1.6 in time for my finals?
The Q3 2026 target means July-September 2026. If your finals are in May, you'll be on 2.1.5.01 with workarounds.
Can I take the exam on Tahoe with the workarounds?
Yes - the workarounds are documented and reproduced. Add 15 minutes to your pre-exam time and click Allow on the Screen Recording prompt that appears at every launch.
My M4 Max takes 30 seconds to initialise. Is something wrong?
The vendor-acknowledged slow init is 8-15 seconds longer than baseline (so total launch ~25-30 seconds vs ~15 on M3 Pro). 30 seconds is at the high end but within the documented range.