- Scroll to the bottom of the menu to the "Firm Update" option which should now be available. If by chance that you fail to see the "Firm Update" menu option try pressing your Playback button twice. You might have to wait 2 seconds between presses. When this is done right the lens will retract and go into a power-saving viewer/slideshow playback mode. This seems to be an option on most Powershot Cameras.
I was using the playback button, and I unarchived using terminal...% cd /Volumes/CANON_DC% unzip ~/ixus100_sd780-100c-0.9.9-966-full_BETA.zip
Started by Sam Rhodes General Help and Assistance on using CHDK stable releases
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