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When I flashed all I had to do was install the Arduino IDE and plug into it via USB then it came up in my Arduino IDE.. I can no longer offer support because this seems to have gone far from the normal path. Why are you burning bootloaders it comes with?

Did you get the Arduino IDE from official sources? https://www.arduino.cc/en/Main/Software

Did you get the special drivers for mac because they suck and nothing works right? https://github.com/adrianmihalko/ch340g-ch34g-ch34x-mac-os-x-driver

Did you follow the directions to install the Anet board def in arduino? https://github.com/SkyNet3D/anet-board

Also you should look at Skynet for stock Anet board : https://github.com/thijsk/Skynet3d

At this point it might be easier to replace your board seeing as we don't know what bootloader you flashed onto it.