Latest SuperSU uses system-less root and I don't think you can write to /system/xbin from MM (in 820).Now in marshmallow after rooting you can use Busybox from Play Store. SuperSU in version 2.65 is enabling file system overlay and you can modify /system/xbin dir.
Wysłano z Tapatalk / Sent with Tapatalk
chainfire said:A poor man's overlay is used on /system/xbin. We are creating a copy of /system/xbin in /su/xbin_bind, adding a symlink to /su/bin/su there, then mounting the entire thing on top of the original /system/xbin. This is likely to fix some compatibility issues with some apps, without actually modifying /system
My friend, I suppose there is a misinterpretation of chainfire's concept. The idea is, transparently placing files in /system BUT without modifying the actual partition. Pls take a look once again...... SuperSU creates layer on /system/xbin path. You can write files in this path but changes really is saved in /su/xbin_bind ....
Here everyone working Busybox for HTC 820
Download it and Flash it through Custom Recovery. (TWRP or CWM)
Credit Goes to bionic@xda