There are actually three different ways to fix the issue and they're all pretty easy.
The Firmware error, while trying to update to Firmware V1.40, seems to specifically impact Silhouette CAMEO 3 users who are working on a MAC computer - specifically those who are running the Sierra operating system (OS) or a sub-version of Sierra such as El Capitan.
For those users, there are three different things you can do to try to fix the Firmware errors.
First, after downloading the firmware files onto your computer from the Silhouette America website - restart your computer. Do this before you go through the process of updating the firmware.
The next option, if that doesn't work, is to go through the steps on Silhouette America's support page for updating the firmware while running Sierra OS. This involves just one or two extra steps.
Finally, if that doesn't fix the firmware errors and you are still getting a firmware update error, the easiest way to get around the problem is to simply use another computer to complete the firmware update. This can be pretty much any computer that's running a different operating system - even a PC.
Remember - the firmware update, while downloaded onto the computer, is directly related to the Silhouette CAMEO 3 cutting machine. It has NOTHING to do with the Silhouette Studio software. In fact the computer used for completing the Firmware update doesn't even need to have Silhouette Studio loaded on it. It just needs to be able to download the Firmware update from the Silhouette America website and have a USB port where the CAMEO 3 can be plugged in and powered on.
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