I've been buying old Canon Powershots from 2007 and loving shooting with them and want to add RAW with CHDK. I spent hours trying to use the STICK and CHIMP apps but the newest Apple OS 12.2.1 absolutely will not communicate with them. I even pulled out old laptops going back to Mountain Lion and still couldn't get any of the apps to communicate. Does anyone have a suggestion of how I can add CHDK via the SD card without using one of these old apps?