Mac Mini’s Internet connection is very slow, every other device’s connection is fine. (PC, iPhone, Xbox 360)

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Problem :

I recently haven’t used my Mac Mini for about 5 days (however it was left on).

I seem to be able to connect and get great download / upload speeds through my PC, Xbox 360, iPhone and parents’ laptop.

However, my Mac Mini is very slow.

Mac OS X’s is downloading mail at 0.4kbps and then dropping to 0. Skype file transfers are doing the same. Browsing the net is a terrible experience. It is taking 30 seconds or more to download basic pages.

All of my devices connect wirelessly to a Netgear router / modem.

I have tried giving the Mac Mini a manual IP, and renew DHCP lease, as well as flush DNS in Terminal.

I have also rebooted the router / modem twice, and the Mac Mini twice.

Do you know what could be causing this? Thanks

This is very weird. It is also very slow accessing localhost (setup through MAMP) and also slow to access the Netgear router config pages.

Solution :

I had the same problem. I changed the settings of the WiFi channel to “auto” and – guess what – all fine and dandy now.

My mac mini was having slow wifi issues as well. After reading that the issue is sometimes caused by bluetooth, I disconnected my old, Microsoft wireless (but not bluetooth) mouse and the problem instantly went away.

Look in activity monitor and see if anything is chewing up resources. Perhaps you have a runaway process pegging your NIC that you’re unaware of.

I know this is probably a stupid question, but you’re not running anything like NetLimiter are you?

Have you tested with a wired connection? That may rule out whether the AirPort device on your MacMini is flaky or not.

Additionally, you could play with the MTU and duplex settings under the “Ethernet” tab inside the advanced network preferences for the selected network interface.

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