Now you can upgrade your ZUK Z1 to android marshmallow 6.0 simply by installing cyanogenmod 13 rom in your device.You can get detailed information of Lenovo ZUk Z1 from our previous post Full specification of Lenovo ZUK Z1.
Still want to install it then follow below step on How to install Cm13 rom in ZUK Z1.Also Check out which device got official CM 13 rom from here
Make sure your have custom recovery installed in your device TWRP recovery is recommended for it.
#How to install official CM13 in Lenovo ZUK Z1
1.Download official CM13 Rom for Zuk Z1 and the appropriate Gapps 6.0 package from link given below Copy it in your in your device.
2.Now place the Cyanogenmod 13 rom and gapps 6.0 zip file in sd card.
3.Now reboot to TWRP Recovery mode
4.Then flash CM13 android marshmallow rom and gapps from recovery in it.
5.Now Clear cache and Clear Data.
6.Reboot your device.Done! you just flash cyanogenmod 13 rom in your Zuk Z1.Enjoy Android Marshmallow 6.0.
1.Download Cyanogenmod 13 rom for zuk z1
(download the latest built according to date).