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Your old cable should work fine. Most of all new printers share same type of cable. It should look like this --> https://www.amazon.com/Canon-Pixma-Printer-Cable-Cord/dp/B00404SUZ4
Canon doesn't provide paper manual. You have to download and print. You can download the manual from here --> http://gdlp01.c-wss.com/gds/5/0300019465/01/MG5700ser_OnlineManual_Mac_EN_V01.pdf
Right click or control + click on the above link and select Save Link As and it will allow you to download it.
If you have any difficulty on adding the printer on your Mac, please let me know and I will walk you through it
Hi there, I'm just checking. Were you able to setup the printer ?
If you have any difficulty, please let me know and I will help you with that. Note : You can also setup the printer on WiFi without the need of USB cable. Let me know if you need instructions for that