GPS Repair Problems? Ask a GPS Technician for Answers ASAP
You can purchase the Mini USB charging from Amazon here: https://www.amazon.com/Garmin-N%C3%BCvi-Nuvi-2555LMT-Cable/dp/B00940DBLW
You will need to connect the GPS unit to your computer and use the Garmin Express program to update.
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The Mini USB part goes into the GPS and the USB part goes into your computer. The Macbook Pro does have USB ports on the side.
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Thank you for confirming.
You will need to purchase a USB-C to USB adapter to connect your Garmin to your computer.