2017 iMac 5K BT problems

Discussion in 'iMac' started by macduke, Aug 7, 2017.

  1. macduke Suspended

    macduke

    Joined:
    Jun 27, 2007
    Location:
    Central U.S.
    #1
    I’m writing this from my iPad Pro because this has gotten so bad. My work 5K iMac is having some serious problems with Bluetooth. I tried disconnecting the keyboard and reconnecting it. I tried turning the mouse off and back on but have had problems before my last reboot.

    It first started when I got them machine brand new and was setting it up and installing my apps. I wanted a clean start since my work machines get really gunked up over the years. I had issues with the keyboard holding a key down for too long, even when I wasn’t pressing anything. I also had my mouse intermittently go away and would only reappear after shaking it virgorously for 30 seconds or so. Thought maybe I was having interference with my old iMac sitting next to it with that mouse and keyboard. After some reboots installing stuff, everything has seemed mostly fine. I had some occasional stutters towards the end of last week, but nothing crazy. However this afternoon it has lost it’s damn mind. Most of the problems are with the keyboard. It will be typing and it will just pause for 10 seconds and then slowly type out what I had written. Sometimes it will do that, but randomly add extra spaces or act like I held down a key and tries to select a foreign character as it goes slowly typing things out and missing parts of words. Other times it will just not respond at all, and then it will be fine for a few minutes and randomly start acting up every 10 seconds on and off. I’ve even turned off my old Magic Mouse and took the batteries out of the old keyboard.

    It’s super weird and pretty crappy for a spec’d out $4000 machine that has fresh everything. What makes me wonder if it’s a hardware issue is that it was doing it right out of the freaking box. Anyone else having this issue? I have the full sized (num pad) wireless keyboard, and I also have AirPods connected, and I also use Apple Watch to unlock. I know for sure the issue started before I sell up the Apple Watch thing, but not sure when I connected my AirPods. Oh, and that reminds me—my AirPods did something weird where the left side disconnected for 10 seconds or so and then reconnected but was out of sync slightly which made an echo between the two. Disconnecting and reconnecting didn’t work, so I had to pair them to my iPhone and then back to the iMac for them to work.
     
  2. curmudgeonette macrumors 6502

    Joined:
    Jan 28, 2016
    Location:
    California
    #2
    You have something causing interference on the WiFi/Bluetooth radio spectrum. This could be a defective device - or a bad USB3 cable/device.

    I was chasing a similar problem at my friends' house. It now appears the problem was some sort of charging cable left plugged into a USB port on the back of a TV. They've had no mouse/keyboard problems ever since I unplugged that cable and hid it away.
     
  3. macduke thread starter Suspended

    macduke

    Joined:
    Jun 27, 2007
    Location:
    Central U.S.
    #3
    Didn’t think a USB could be causing the problem but I’ll try tomorrow. I was charging my iPad Pro today but I don’t recall having anything plugged in while setting it up as I was moving files over the network. I use Ethernet to connect as I do web development and it’s faster. WiFi signal is on the weaker side as well but I have it turned on for continuity stuff and it’s not connected to the base station. Thanks!
     
  4. pixelatedscraps macrumors regular

    pixelatedscraps

    Joined:
    Jul 11, 2017
    Location:
    Hong Kong
    #4
    If it's still causing issues after you presumably googled and troubleshoot common Bluetooth interferences with iMac 5ks, I would simply hop on a call with AppleCare and state you've been having issues with your new iMac and they'll handle it from there.

    In many years of using Mac computer hardware and troubleshooting issues, I've only had the best customer service experiences with Apple.
     
  5. burgman macrumors 65816

    burgman

    Joined:
    Sep 24, 2013
    #5
    On my new 2017 27 inch using the supplied keyboard, mouse with trackpad 2 all was fine until I paired my AirPods. Lots of static and dropouts on AirPods, Trackpad and keyboard errors. Nothing I tried helped until I turned off keyboard and trackpad, then used the AirPods. Haven't had a problem since, knock on wood.
     
  6. curmudgeonette macrumors 6502

    Joined:
    Jan 28, 2016
    Location:
    California
    #6
    USB3 operates at almost the same frequency as Bluetooth and 2.4GHz Wi-Fi. An unshielded or defective USB cable can wipe out the wireless bands. There have been numerous threads here where the poster has had to stop using certain USB devices because of the interference.
     
  7. pixelatedscraps macrumors regular

    pixelatedscraps

    Joined:
    Jul 11, 2017
    Location:
    Hong Kong
    #7
    Case in point: installing a USB 3.0 PCIe card into a Mac Pro is likely to severely degrade your BT signal to the point you either have to shield it yourself in EMI foil or buy a BT USB dongle...
     

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