You can download the CyanogenMod 10.1 nightlies for your Galaxy S4 from here (T-Mobile) and here (Canadian variants).
CyanogenMod 10.1 For Galaxy S4 Download Now Available
Posted on the 05 May 2013 by Skateroren @ProgramsAliveYou can download the CyanogenMod 10.1 nightlies for your Galaxy S4 from here (T-Mobile) and here (Canadian variants).