Download Android 7.1.2 stock firmware for MAGICSEE N6 Max TV Box from here or here. Download previous firmware version from here. Download Rockchip Driver Assistant v4.4 from here and download Rockchip Batch Tool v1.8 from here.
Model: MAGICSEE N6 Max TV Box
Image file size: 852 MB
Platform: Rockchip RK3399 / RK330C
Image name: update.zip
FW version: 7.1.2
Build number: rockchip/rk3399_box/rk3399_box:7.1.2/NHG47K/20190116:userdebug/test-keys
Caution: Please do not update firmware unless you know what you are doing, you really want it or it is absolutely necessary. Firmware updates may occasionally have bad results, like bricking your device, temporarily or permanently. The firmware update process is done entirely at your own risk. Before attempting to update the firmware, back up your data.