![liteicon yosemite liteicon yosemite](https://img.gadgethacks.com/img/60/34/63538707411176/0/make-your-macs-dock-app-icons-look-like-yosemites.w1456.jpg)
It depended on a few sets of icons I had already downloaded. Here is the script that I used to do this manipulation.
![liteicon yosemite liteicon yosemite](https://www.monk-jp.com/mac/2015/150508/images/150508_01.png)
Found the relevant files, and replaced them manually.
LITEICON YOSEMITE MAC
Booted my Mac from an old 10.7.5 external recovery disk.The workaround (disable protection, reboot, run app, enable protection, reboot) seemed a bit risky to me (security-wise), so I: LiteIcon looks great, but it cannot change the system icons since El Capitan/10.11 - something to do with System Integrity Protection