Wireless internet became extremely slow on my 27" IMac

The wireless internet on my Mac became extremely slow recently on my 27" IMac. I don't recall doing anything different other than doing the Apple Software updates which I let it pop up and install automatically. On my Mac Book internet is still fine so I don't think it's the model or the router.

I'm not sure where to start digging the cause of this or how to solve it. Looking into the System Preferences on my IMac, it's pretty identical to my MacBook!

Solution 1:

I am having the same issues on mine, but it appears to be related to the heat of the machine. If I leave it off for a long period of time and boot it up, the wireless link functions as it should. After it's been on for a long time, it begins to slow way down and eventually drop the connection. Can you trace your problem to the amount of time it's been running?