you can use asprogrammer for ch341 programmer

Apple A1707 will be Program without adapter supply , Just connect ch341 programmer and program it..

Enit sam Connector is used for Macbook, MacBook Air and new MacBook Pro, Macbook Retina models for the years of 2010 – 2011, 2012 – 2014 and 2015 – 2017 models
This connector helps you read and write SPI bios without removing them from the Apple motherboard

*FAQ*

*Que: How to find sam connector in motherboard?*
Ans: Open Apple boardview or schematic and search for J5100 or J6100, this two notation number is used for SPI sam connector

*Que: how many types of sam connector use apple motherboard?*
Ans: Apple’s Year 2010 to 2017 models have only 3 types of sam connector (12dp, 30dp, 30dp)

*Que: How to identify 30dp connector? Because of there is two 30dp connector*
Ans: The internal layout and design of both connectors is different

*Que: is that require external PP3v3 power for program bios ?*
Ans: it’s depending on programmer. use CH341A programmer , you doesn’t need external power just remove battery connector , and plug adapter , Some Apple laptops directly power on without internal battery connection so you have to switch off your laptop and leave it in suspend mode , and program it

*Que: which programmer you have suggested?*
Ans: We suggest the CH341A programmer (this programmer does not require external PP3V3), but we have also tested it in TL866, RT809F, RT809H and SVOD. External PP3V3 is required for all these programmers

*Note:*
All products have been checked and packaged in good condition before dispatch.
In case the item is defective, please inform us within 30 days of receipt, we will replace a new one. No Refunds are offered. Buyers have to pay for the return cost and we will pay the cost for resending.
If you do not understand its purpose - please do not buy it.

Apple A1502 Program bios without jumper PP3V3 external jumper and without adapter ( internal battery plugged for PP3V3_S5)