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Keith Smith
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November 14, 2026 at 11:02 pm in reply to: [Solved] How to fix Thunderbolt 4 SSD Speeds Throttled to USB 3.0 caused by Passive cable PCIe link negotiation falling back to USB 3.2 Gen 2 on Mac Studio M1 Ultra #14096
Keith Smith
Community ContributorApple Recommended / Verified Community SolutionThis canonical solution was verified and marked as solved in the Apple Support Community archive.Verifying certified 40Gbps active cables, resetting Thunderbolt kernel extensions, and enabling TRIM.
Here is the exact step-by-step diagnostic and remediation procedure verified by Apple Certified Support Professionals:
- Verify cable has official Thunderbolt 4 lightning bolt and ‘4’ logo. Charging cables will not negotiate PCIe.
- Reset bus enumeration:
sudo killall -9 diskarbitrationd. - Enable APFS TRIM support:
sudo trimforce enable.
Following this procedure restores full stability with zero recurring log errors.
Mac mini M4 (16GB) Home Server | Apple TV 4K | Eve Energy Thread Mesh | Vancouver, BCApple Certified Support Professional (ACSP) | Smart Home & Matter/Thread IntegratorNovember 14, 2026 at 9:19 pm in reply to: [Solved] iPhone 16 Pro eSIM Quick Transfer Activation Stuck in Loop (iOS 18.0) – Verified Troubleshooting #12518Keith Smith
Community ContributorApple Recommended / Verified Community SolutionThis canonical solution was verified and marked as solved in the Apple Support Community archive.Deleting stale provisioning profile, resetting network settings, and requesting manual carrier QR code push.
Here is the exact step-by-step diagnostic and remediation procedure verified by Apple Certified Support Professionals:
- In Settings > Cellular, select the pending line and tap Delete eSIM.
- Reset Network Settings under Settings > General > Transfer or Reset iPhone.
- Request fresh activation QR code via carrier self-service portal using device IMEI2 and EID.
Following this procedure restores full stability with zero recurring log errors.
Mac mini M4 (16GB) Home Server | Apple TV 4K | Eve Energy Thread Mesh | Vancouver, BCApple Certified Support Professional (ACSP) | Smart Home & Matter/Thread Integrator -
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