Hello Walter. Thanks for taking the time to reply. All of those things I'd already done repeatedly to no avail. However...
(and this is where it gets weird)... This morning I downloaded another copy of the 1.0.2 firmware from a different site, and repeated the usual steps. This time it worked!
To review, I had a 1.0.2 firmware copy originally downloaded from Canon stored in three places (on the card in camera itself - the one from which ML normally runs), a dedicated installer card (from which I updated the camera back when I first started using ML) and on my computer.
None of these three worked as described in my original post. Afterwards, I searched and found a copy of 1.0.2 online at a major (reputable?) support site, and tried using that one also without success.
This morning I risked a download of 1.0.2 from a site that I did not recognize as reputable, meaning it wasn't a major or common site relative to photography, however this copy successfully installed (down-graded) as expected!
Some relevant (??) data: All of the firmware files referenced in this exercise are exactly the same file size, and equal the size referenced in the "read me" included in the downloads. The ONLY difference is that all of the ones tried prior to the final successful attempt were downloaded as .dmg files (I'm on a mac)... and this morning's came as a ZIP file!
Regardless, glad to have ML back in service, and thanks again.
(and this is where it gets weird)... This morning I downloaded another copy of the 1.0.2 firmware from a different site, and repeated the usual steps. This time it worked!
To review, I had a 1.0.2 firmware copy originally downloaded from Canon stored in three places (on the card in camera itself - the one from which ML normally runs), a dedicated installer card (from which I updated the camera back when I first started using ML) and on my computer.
None of these three worked as described in my original post. Afterwards, I searched and found a copy of 1.0.2 online at a major (reputable?) support site, and tried using that one also without success.
This morning I risked a download of 1.0.2 from a site that I did not recognize as reputable, meaning it wasn't a major or common site relative to photography, however this copy successfully installed (down-graded) as expected!
Some relevant (??) data: All of the firmware files referenced in this exercise are exactly the same file size, and equal the size referenced in the "read me" included in the downloads. The ONLY difference is that all of the ones tried prior to the final successful attempt were downloaded as .dmg files (I'm on a mac)... and this morning's came as a ZIP file!
Regardless, glad to have ML back in service, and thanks again.