Is the StarTech MDP2HDMM1MB compatible with MacBook Pro?

Yes, the cable is compatible with mDP enabled computers such as MacBook Pro or Air.

What is the maximum resolution supported by the StarTech MDP2HDMM1MB Mini DisplayPort to HDMI Converter Cable?

The maximum resolution supported by the cable is 4K x 2K at 30 Hz.

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StarTech MDP2HDMM1MB Mini DisplayPort to HDMI Converter Cable - 3 ft. (1m) - mDP to HDMI Adapter with Built-in Cable - (M / M) Ultra HD 4K

Eliminate clutter by connecting your PC directly to an HDMI display with a 3ft cable
Compatible with mDP enabled computers such as any Surface Pro, MacBook Pro or Air and HDMI enabled monitors televisions and projectors
Supports resolutions up to 4K
Mini DisplayPort to HDMI converter / MDP to HDMI cable / Mini DisplayPort to HDMI adapter / 4K adapter cable
Install in your home workstation to make your Mini DisplayPort computer compatible with your HDMI display