If you download 1-click-root or 1-click-cockworkmod, inside is a folder called Files, inside that is a file called adb. You can use that to push the file to your SD card. Follow:
- Enable USB debugging
- Plug your phone into your computer
- Open Terminal (can be found by typing terminal into search)
- Type cd followed by a space
- Drag the Files folder inside the 1-click folder into your terminal window, press enter
- Type the following: ./adb push *drag and drop SC 2.6 zip file here* /sdcard/
- Press enter and the file will be pushed to your sdcard
An example to step 6 is:
./adb push /Users/Username/Desktop/Android/super_frankenclean_2_6nv.zip /sdcard/
Let me know if you have any other questions.