If you are like me and only read manuals "if all fails", this might help you to get the L4.1.15-1.0.0-ga_images_MX6QPSABRESD collateral working quickly on the CIMX6QP-SDB board :
( writing the SD card in OSX )
$ diskutil list
$ diskutil unmountDisk /dev/disk1
$ sudo dd if=fsl-image-qt5-x11-imx6qpsabresd.sdcard of=/dev/disk1 bs=1m && sync
Interrupt the u-Boot process and :
setenv mmcargs 'setenv bootargs console=${console},${baudrate} ${smp} root=${mmcroot} video=mxcfb0:dev=hdmi,1920x1080@60,if=RGB24'
save
reset
