There have been a few threads lately about slow Macbook internet out of the box, with the Mac getting download speeds much slower than the PCs on the same network. I was finally able to fix this issue with my Macbook.
I have a new SR Macbook with Leopard preinstalled. Out of the box, the internet was about 1/4 as fast as my PCs, with both wireless and directly connected to the modem. Some people have reported changing the DNS servers to the openDNS.com servers under TCP/IP and the router solved the problem for them. It solved it partially for me, but internet was still quite slow.
I finally came across http://miranda.ctd.anl.gov:7123/
This can diagnose where the problem is on your network. For me, it said there was a duplex mismatch (host full switch, client half switch). It only said this on 3 of the 5 times I ran the test, since I believe it's an intermittent issue.
So I went to system preferences -> network -> ethernet -> advanced -> ethernet .. and changed the "automatic" setting to the following:
Configure: Manually
Speed: 100baseTx
Duplex: full duplex
MTU: Standard (1500)
This worked for me, and the wireless and direct-to-modem internet is screaming. I am using an Airport Extreme Base Station with Comcast cable modem. Hope this helps.
Its simple and web pages immediately began loading in a blink. So if you're experiencing slow browsing on your Mac give this a shot - it sure worked for me.
To view the full thread on MacRumors.com click here.
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