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Audio, Navigation System & Related • 2011 Flex - lost SYNC to entertainment system

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Bought this Flex about 3 months ago - still getting acquainted with it, liking it for the most part.

My wife finally figured out how to connect my iPhone 15 to the entertainment system - this is the non-navigation unit. Everything has been working pretty well until a couple of days ago.

My iPhone updated to iOs 17.6.1 - now, I get in the vehicle and the phone won't connect to the system. I tried deleting and adding it back - no good. The system keeps telling me it can't find the phone. I tried disconnecting the battery - completely - and re-connecting it - no good.

A few places I've checked have suggested the Ford system needs to be updated - I've seen suggestions about loading a file from Ford onto a USB and plugging into the vehicle's USB port to update the system. Apparently, I don't have a suitable USB drive for this job - one is too small and the other is formatted for a Windows PC, whereas I have a Mac. I'm feeling that if I go buy a new USB and download a file, it still probably won't work, and might end up corrupting the system in such a way that it might have to go to a dealer, or a complete new system might be necessary.

It was working so well until the iOs update. Anyone's input would be appreciated here.

TIA

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