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macos – How do you turn on write blocking to USBs on a Mac?

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I’m trying to capture a forensic image of a USB stick using Linux dd on my Macbook. I’m having trouble turning on write blocking to the USB stick before taking the image. In Windows you use a registry tweak to prevent writing on the USB stick- how do you do this on Mac (without spending money for a DLP solution)?

Is this still valid to achieve that effect on MacOS, or did an update nullify it:
sudo kextunload /System/Library/Extensions/IOUSBMassStorageClass.kext

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