MacBook Pro M1 OWC Thunderbolt 4 Dock and slow performance with SandDisk Extreme Pro Drives

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MacBook Pro M1 OWC Thunderbolt 4 Dock and slow performance with SandDisk Extreme Pro Drives

I just purchased another SandDisk Extreme Pro 2 TB Drive so now I have 2. I have been testing with Blackmagic and performance is just over 500 MB/s read and write. I have tried both drives with shorter and longer cables that came with the drive. I am pretty sure I tested the first drive and got over 2000 MB/s. I am now running the latest version of Big Sur as of 04.27.2021 and not help. I thought the OWC TB 4 dock was the solution.

Posted on Apr 27, 2021 5:47 PM

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Answer 1

bryanr14

Community Specialist

Apr 28, 2021 2:19 PM in response to HoldSteady9

Hello HoldSteady9,

Thank you for reaching out in Apple Support Communities. We understand that your external devices is not running at optimal performance, which is connected to your MacBook Pro with the Apple M1 chip. We'll be happy to help.

To help troubleshoot this behavior, we recommend to follow the section in this article that says, "Get the best performance from your USB devices": About USB on Mac computers These steps are relevant to the issue you're experiencing and may help.

In addition, you'll want to restart your Mac in safe mode. This will help verify your startup disk, attempt to repair any directory issues and more. Here's an article with additional details and the proper steps to take: How to use safe mode on your Mac Once you're in safe mode, please restart your Mac as normal and test the performance of your external devices.

Kind regards.

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MacBook Pro M1 OWC Thunderbolt 4 Dock and slow performance with SandDisk Extreme Pro Drives

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