Resolve Wi-Fi and Bluetooth issues caused by wireless interference
Apple cannot fix what is wrong. In all probability you have a cable leaking RF in the 2.4Ghz frequency, which is used by both Bluetooth and Wi-Fi. We know this to be true by your own words : when you connect your Apple bluetooth accessories by wire the problem goes away. This necessarily proves the problem is wireless in nature. If the problem is wireless in nature, then something is interfering with the wireless signal. If something is interfering with the wireless signal, the most likely culprit is a faulty cable. To Wit :
If you're using USB 3 devices with your computer, you can limit their potential to interfere with nearby wireless devices:
- Use a high-quality, shielded USB cable with each USB 3 device.
- Move your USB 3 devices—including any USB hubs—farther away from your wireless devices.
- Connect USB 3 devices to the ports farthest from your computer's Wi-Fi antenna. For example, if your computer has ports on the back, prefer the USB ports closest to the middle. If your computer has ports on the side, prefer the USB ports closest to the front.
- Turn off any USB 3 devices that aren't in use.
Apple cannot, does not and will not warrant the fitness of products they do not manufacture. Therefore, it is not logical or reasonable to demand a "fix" from Apple. The "fix" for which you search is unplugging every cable within 30 feet of your Mac, and plugging them in one at a time until you find the faulty cable(s).
Good luck !
