Then at least it's not a problem with insufficient power supply
Armbian uses mainline u-boot while loboris relied on Allwinner's old u-boot version from 2011.09 -- in case you have any USB peripherals connected please try rebooting without connecting them (sometimes u-boot misinterprets signals sent from USB devices as keystrokes and then stops autoboot and waits for commands... indefinitely -- we disabled USB in u-boot for H3 devices but IIRC this fix is not included in our old 5.14 OS images).
The other known show-stopper are bad SD cards -- Armbian does things differently than loboris since we resize the rootfs on 1st boot and in case you use a counterfeit or faulty card things might get stuck here.
Anyway: Serial console output would be helpful and in case you use a new or different SD card, simply test it prior to useage: http://docs.armbian.com/User-Guide_Getting-Started/#how-to-prepare-a-sd-card
In case you're not using homebrew, MacPorts or the like on your OS X machine you find here statically linked f3 binaries: http://kaiser-edv.de/tmp/JcyTCE/ -- use disk utility to format the SD card with OS X and then change to the mountpoint and let f3write/f3read do their job.
