Schusterjunge
I was just about to post the link in your 'EDIT 2' to http://osxdaily.com/2014/05/01/change-finder-dock-icon-mac-os-x/
I just found that and it worked for me. Haven't finished changing everything, but you get the idea (see attached)...
(Running OS X El Capitan 10.11.3 Beta)
First off thanks for everyones input in this thread as I found my solution through problem solving various options posted in here - I was most annoyed to lose my cherished Icons when I updated to El Capitan!
I followed all instructions on here and had zero luck with the manual way...I even copied the resource folder with my icons in it and replaced the one in the core system resource folder, but that didn't work either.
My solution was the following: My current build is OSX 10.11.2 and Liteicon 3.6.2
- First boot into recovery mode (Restart and hold CMD + R) and disable the sytem security (this will make your machine vulnerable, so ensure that once finished, you re enable it)
- Once booted in recovery mode, select utilities (Top left) and then Terminal - Type the following: csrutil disable
- Once you have restarted, Open Liteicon and drag the required icons into their slot, then reboot your machine for them to take effect.
- Check the icons have all changed and are the correct ones you chose and if you are happy, reboot the machine again in recovery mode as before.
- Once in recovery mode, select Terminal again and type the following:csrutil enable
- Reboot and check that all of your icons are still set to the custom ones you chose.
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