Painfully slow downloading over wireless.

see

http://discussions.apple.com/thread.jspa?threadID=338281&tstart=0

For Bittorrent go to System Preferences, Sharing,Firewall. Select new, call it BitTorrent, port name Other, ports 6881-6889, UDP leave blank. This should help your BitTorrent transfer speeds.

Steve

I have the exact same problem with a iMac 17'' core duo. Unusable internet via wireless, fine wired. Many other computers on my network use the airport express access point with no problem. Something seems wrong with the airport card/driver on the core duo. Please let me know if there is a fix or more information elsewhere.

Thanks,
Scott

Same problem here. Performance of wireless internet on the intel iMac is very poor. My PB, which uses the same Airport Extreme base station, has no speed issue.

I hope the issue can be fixed with a software update. Apparently the new iMac has a different Airport card installed?

iMac Core Duo, Powerbook G4 (DVI) Mac OS X (10.4.4)

iMac Core Duo, Powerbook G4 (DVI) Mac OS X (10.4.4)

Uploading files with Adobe GoLive CS2 is S-L-O-W over wireless. The other three computers (all G4s) on my network run fine. My average upload speed with GoLive is around 20k PER MINUTE!!! I wold be better off using a 28.8 dial-up modem.

I spent half an hour on Apple "Chat" tonight with Customer Care. They were very polite, but told me they were not allowed to "forward" my complaint -- I have to call someone at AppleCare and start all over again.

After updating the firmware on my base stations it got slightly better, but the connection still dropped several times.

Then I selected "Use Interference Robustness", from the pull down menu under "Airport status" in the menu bar. And that seemed to work. The iMac is now the fastest one, using my Airport network. So maybe, checking this options is at least a temporary solution.

iMac Core Duo, Powerbook G4 (DVI) Mac OS X (10.4.4)

Just a "me too". Received my 20 inch, 2GHz, 2GB today. Most things are pretty good so far but the net connection was so noticeably slow I did a speed test. This showed 273Kbps downstream for the new Mac versus 1174Kbs for the old G4 PB 1GHz 512MB next to it. Interestingly the upstream speeds are similar for the two machines - around 216Kbs. My line should provide 2Mbps down, 256Kbps up.

My wireless adsl modem/router is an old Dlink 604+ which is 802.11b but this should be well fast enough to match my internet connection. I'll try to add another bug report and bother Apple about this in the morning.

iMac 20" early 06 Mac OS X (10.4.4)

Hmmm. Seems the problem is much worse than I first described. Its starting to become impossible to even load a single page. I have to keep switching airport off & on to get any bytes from the world at all.

BTW I currently have no encryption turned on. The "interference robustness" switch appears to make no difference to me.

If things carry on like this it will be a showstopper for me.

My wife and I just added two iMac DC 17s to our orchard. We are having identical problems as indicated here. We have a D-Link 624 router with our iMac 800 mhz wired and a 15in. PB wireless downstairs in our kitchen. Our download speeds are almost always fast and trouble free until we placed the two new computers in the network (wireless). The new unit in the kitchen is cruelly slow, but we definitely notice the oscillation problem this morning. However, the other new iMac is upstairs right next to the router and it seems to download at the expected speeds of the other two older computers.

This morning, I was trying to download the G-Force visualizer for the new iMac in the kitchen and the downloading was oscillating and was taking a good 15 minutes when I aborted it. I immediately unplugged the machine, took it upstairs and tried it right next to the router. Guess what? It downloaded the software in about 10 to 15 seconds!

Distance does matter, apparently.

Also, I didn't know that I could use Airport Express with the D-Link 624 router to extend the signal. Does this work?

John B.

iMac DC 17 Mac OS X (10.4.4) Also own iMac 800 and PB 15

I've been seeing some consistencies in the complaints about lack of speed and I did question some of the user setup descriptions.

This is the first thread I found where someone finally mentioned the "Interference Robustness" option and finally someone also brought up distance from their router.

I acquired the iMac Intel unit yesterday and waited until today to install the 1 gig ram chip. I almost returned the unit yesterday with in 10 minutes of firing it up. My Power Book screams on every wireless system I've been on. I couldn't believe how slow and doggy the internet connection was initially. I expected the additional ram would clear up what I was experiencing.

Today, I connected to my ethernet print system and noticed a significant increase in browsing speed. I began to think this machine has not cached any of the usual sites I frequent, but then I came across the WPA/WEP issue. I'll look later tonight and see which of the 2 I'm using, WPA/WEP.

About 30 minutes after I installed the new ram, this unit began to come up to the speeds I'm accustomed to on the Power Book.

I believe the "Interference Robustness" option may aid the issue. More ram will help for all situations, and as the caches fill up, speeds should start coming up.

I've seen lots of discussion about this but no fix unfortunately. I'm using the AirTrafficControl widget and it really highlights just how much the speed of the connection continually jumps. It almost looks like the Airport disassociates when it looks for other connections. However I think it's more likely that this could be the problem:

http://www.intel.com/support/wireless/wlan/sb/cs-006205.htm

I got there by following a link from an FAQ about the wireless chipset now used in the Core Duos. Of course Apple don't expose the power-saving options to us mere mortals, so I suspect we'll have to wait for some kind of software update to solve this issue. 10.4.5 doesn't seem to have been the solution unfortunately.

It makes me a little concerned for the performance of the MacBook Pros where you most certainly will want the power saving features.

By the way, I'm having this problem when trying to connect to an Airport Express 6.3 and with a Mac mini with Internet sharing enabled.

iMac CD 20", Mac Mini, PowerBook G4 Mac OS X (10.4.4)

This is a follow-up on the same problem of slow download speeds.

Yesterday a tech specialist from Apple got back to me about the problem after I called them.

The engineering departments says that there is inteference between channel 6 on wireless routers with Bluetooth. They told me to change to any other channel and the problem should be solved. I just changed my D-Link 624 to channel 11 returned to our wireless keyboard and wireless mouse and we now have screaming fast download speeds that match our 15 inch PB.

Hope this info helps others solve this problem.