continuous beeping sound when plugged into iMac

My problem was with dinging when my IPhone was plugged into my iMac. Changing the charging cord did the trick. I used the cord from my IPad (which isn't frayed on the end).

Way late for your issue (I hope), but I was having this issue with my iPhone SE and my (mid 2013) MacBook Air. I have the latest iOS installed (11.0.2), as well as latest macOS (10.13) and latest iTunes (12.7.0.166). The phone repeatedly dinged and would not stop. Tried various cables, etc. No luck. I turned off iCloud on the phone; still dinging.

Finally, I put the phone in Airplane Mode, and it connected fine to my Mac and iTunes -- first time -- no issues.

Weird and a PITA. Hopefully Apple fixes this in an upcoming update.

HTH someone.

K___H

I had this problem with my iPhone 6 when plugging it into my Macbook Air.

I have tried to change the cord, and I have also tried another also original cord with my friends iPhone, but the repeated beeping was just randomly there - it was clearly something wrong with both of my Macbook Air USB ports. What kind of weird bug is this? It has started maybe few months ago, once in a while, but now it can go like crazy, every second.

Now I have tried to put my iPhone to airplane mode and IT REALLY WORKS. iPhone is charging quietly first time in weeks. WOW.

THANKS GUYS for help. Saved me a trip to the service.

It worked for me too. Just changed the connecting cable

I had this problem and changed the USB cable to another one, and the problem was solved. It stopped bleeping.

Also had this issue after updating last night. Put into Airplane mode and now it works. How totally bizarre and hope it is fixed by Apple soon.

If I power off the iPad, plug in any cable, then power the iPad up it works. I am using the iPad as a second monitor with DUET

Thanks for that suggestion, K___H. I was experiencing the incessant beeping (signaling repeated connect/reconnect) when connecting my iPad Air to my MacBook for syncing and/or charging. Switching the device to airplane mode seems to have resolved this!

I had the same issue until I turned off Airplane mode, then it worked perfectly.

I have the same problem. my ipad and mini keep ding when I connected any of them onto macbook.

but iphone 7 does not using the same cable. totally weird.

It blocks my usage of DUET app.

could anyone from apple fix this please?

This solved my problem. Thanks.

Yesterday when I plugged my iPhone charger in my phone kept bleeping, same tonight but only 59% charged. Have switched off and back on

Yup That fixed same issue for me thx!

Hello Ghee_Ghee,

If you're hearing a continuous beeping sound then it's likely that your iPad doesn't have a stable connection to your Mac. While there may not be an explicit alert, the article linked below details a number of steps that can help stabilize the connection between your iPad and your iMac.

Resolve USB-related alerts in iTunes
https://support.apple.com/en-us/HT203843

Sincerely