iPhone keeps disconnecting from Mac

I know this does not make any sense, but i tried 5 different ORIGINAL cables and none worked in any of the 2 USB ports. I then tried another brand of cable (acker) I stretch it all the way and once it connected i DID NOT MOVED IT until it was done. And it worked !!! So like I said it does not make any sense at all as 2 of the OEM apple cables where brand new and just got them out of the iPhone box and had NEVER been used before. So the only advice I can give you is: try all different ways of fixing it and don't give up too quick, maybe (only maybe) you will be able to do it.

Had same problem on Late 2017 MBP ;

Little backdoor for your problem.

When nothing connected to Mac . I open VM (parallel) and run windows. when microsoft win. fully lunch you can plug your USB device or idevice; when its connected to VM; you can now shutdown Virtual Machine. Ones its shutdown your USB device keeps connected to your Mac.

ha! this solution worked for me too! but how weird is it??!! there must be an issue with the USB port or cable... but you say it only happens with your iPad and not your other devices. sounds like something apple needs to address...

I was having this problem but fixed it by going to

Disk Utility > Verify Disk Permissions and then Repair Disk Permissions.

Good luck!

Resetting SMC helped me to overcome this. Resetting the System Management Controller (SMC) on your Mac - Apple Support

Reset the SMC > Intel-based Macs: Resetting the System Management Controller (SMC)

this helped me https://support.apple.com/en-us/HT204095

I have the same problem on a late 2013 rMBP - did you find a resolution?

I had the same issue, had to use a different cable. Not really a fix.

I circumvented the problem by switching to another cable.

It would be nice to get a proper fix from Apple though.

I also had the same problem with my 2013 rMBP and my iPad3. Anybody have any solution for this?

Only solution I found was to use a different cable.

Okey, I will try, but I hope Apple will fix this. Really annyoing.

Yes

Yes