1002      iPhone_iPad_Mac_apple

iMac (27inch, mid 2011) WIFI connects only onto...

My iMac 27 inch serial number C0****HJQ and after the Sierra iOS update, I have an issue with the wifi access. The internet connection keeps dropping out every few seconds continuously. When running the diagnostics, ISP, Server and Internet stays in the red, connects momentarily green and then disconnects again. Note, the wifi doesn't disconnect though. I tried all possible remedies online except for changing the wireless mode from mixed mode of 802.11 to 802.11g only. This worked. However, before I connected the Apple Mac to this router all my other computers in my house including my apple iPads and iPhones all worked without any issue including my wireless printer. I cannot understand why only my Apple Mac computer doesn't connect on mixed mode and only works on 802.11g mode only. Even changing the wireless router itself didn't help and also I changed to the airport express 802.11n and still did the same unfortunately.

As of present I am using the above mentioned wireless router which is with the fibre optic connection and the settings as shown above. The internet connections stays steady with these settings on the Apple Mac.

Has anyone had this similar issue? Does apple have a solution for this. I feel its something wrong with the computer software itself and noticed this after the Sierra iOS upgrade. Could anyone suggest a possible solution for this and using only the G mode, does it slow down the wifi connections speed unlike when using the mixed mode? I tried all possible solutions other than the one and only changing of the mode to only 801.11g mode and that's the only thing which makes the connection stable and doesn't let it drop out.

I have tried every possible solution which I have come across on these threads. I have also tried changing the WIFI router from these ZTE model which came with my Fibre Optics line to the D-Link router as well and still have the same problem when using mixed mode. If anyone can help with this would greatly appreciate it. Below are the details of some of the screen shots I have taken for you guys.

ISP INTERNET and SERVER goes RED and no data transfer when I change to Mixed mode, other than only 802.11g

<Edited by Host>

最後更新：2017-09-14 03:07:23

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