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Recently my Wifi connection has suffered greatly on my MacBook Pro mid2012 non-retina. I now need a much stronger Wifi signal to have a working connection. I did not change my position at my desk (home and office) nor the router hardware. Other Macs have no problem at the same spot.

Wifi issue

Since the problem appeared right after the OS X 10.10.5 update and others seem to have similar problems, I am not sure if I am dealing with a hardware or a software issue here. Is there a way to sort that out? I was thinking one could, for instance, measure the electrical resistance of these connectors here:

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What I tried so far:

  • AppleCare stress test - no issues found
  • setting DNS servers manually
  • SMC & NVRAM reset
  • delete /Library/Preferences/SystemConfiguration/

UPDATE

It turned out that the antenna cable in the black plastic bar on the screen was in contact with the screen's hinge. So every time I opened or closed the screen, the cable was cut a little more. This seems to be a weak design or faulty assembly in my MBP. I would still be curious how this could be diagnosed without disassembling almost the entire MacBook.

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