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That's totally irrelevant :confused:.

This shows the loss over wf-fi v. ethernet cable...

On a 5GHz network, n Channel, your maximum theoretical transfer is 300Mbps full duplex ( I guess ? )x 150Mbps Up 150Mbps down ( half-duplex )

Practically your transfer rate will vary ~ 75-120 Mbps depending on your environment and interference.
 
yeaaaaah I get several hundred megabits per second on my local network via wifi, ignoring this little issue.

I recommend others in this thread dealing with this talk to Apple. They seemed totally unaware of it when I spoke to them on the phone today, and again at the Apple store. On the phone the guy was adamant that it was an issue with the iMac, even though I can demonstrate the same issue on a late-2013 13" macbook. I bought both of them, and my access point, to the apple store to demonstrate to them. The Genius acknowledged that there's definitely something wrong but, as expected, that there wasn't anything they can do about it in store --not like it's a phone where they can just swap it out, both laptop and desktop are very built to order. He said to hold out hope that a firmware/driver patch comes soon.

I'll be contacting my Apple enterprise rep monday morning since this is something that's going to make 60+ new macbook pros at the office totally unusable soon. Really need Apple to at least acknowledge that a problem exists and that they're working on a fix.

Anyone still have Mountain Lion on their iMac with this issue? That's something I haven't tested yet. Only way to get ML back now is to use Internet Recovery (i.e. blow away recovery partition) which takes forever.
 
I've been able to accomplish (with ease) 60MB/s (~500mbit) over 802.11ac between two computers. That's significantly faster than my internet connection, more than fast enough to not use wired.

Of course, this is coming from the perspective of someone with a MacBook Pro (where the WiFi issue is happening as well), not an iMac, so it is a bit different.
 
There is definitely problem with wifi in new macs. In my case rMBP. Today my wife told me she couldn't listen to Internet radio on her new rMBP - too many connection drops, then she opened her old MBA 2010 - and all is perfect.
I looked at it and quickly find out latency problem on new MBP.
In my network I have new Time Capsule (just purchased) so I ping to TC from old MBA and new MBP at the same time.

Below the results:
MBA 2010:
Screen Shot 2013-11-28 at 21.12.03.png
and here new rMBP 2013:
Screen Shot 2013-11-28 at 21.12.17.png

I have made the same test on my rMBP (also late 2013) - same problem as with my wife's one.

This is not about differences between wifi and cable connection - there is clearly something wrong with the new machines.
Just wonder if its hardware or software ...
 
There is definitely problem with wifi in new macs. In my case rMBP. Today my wife told me she couldn't listen to Internet radio on her new rMBP - too many connection drops, then she opened her old MBA 2010 - and all is perfect.
I looked at it and quickly find out latency problem on new MBP.
In my network I have new Time Capsule (just purchased) so I ping to TC from old MBA and new MBP at the same time.

Below the results:
MBA 2010:
View attachment 449468
and here new rMBP 2013:
View attachment 449469

I have made the same test on my rMBP (also late 2013) - same problem as with my wife's one.

This is not about differences between wifi and cable connection - there is clearly something wrong with the new machines.
Just wonder if its hardware or software ...

It's a software issue. Someone else reported that the problem doesn't happen on Bootcamp
 
I just bought a 21.5" iMac last night and am having problems getting the Wi-Fi connection to work consistently. Worked last night but today its not. It doesn't see any networks to connect to unless I turn Wi-Fi off and back on again - then it will see our Wi-Fi network and connect to it. However once connected, its slow as molasses.

The only thing I can think of is that the router is literally placed next to the computer right now, where as last night the computer was on a different floor of the house from the router. I'm looking for an ethernet cable, but I want to know that the Wi-Fi works should I want to use it in the future.

iPhones/iPads aren't having any problems with the Wi-Fi network. Using a Linksys WRT54GL router.
 
I created a bootable USB flash drive with Mavericks using these instructions:

http://support.apple.com/kb/HT5856

I wiped the hard drive via Disk Utility on the flash drive and did a clean install of Mavericks. When it booted up, I saw there was a pair of firmware updates - nothing in the descriptions pertained to WiFi, but I did them anyways. I don't have any WiFi problems now!

I performed the ping test against some sites on the internet, all of the ping times were reasonable (<100 ms) and no packet loss. Let the test run for about 10 mins against a Yahoo server and the DNS server of a local university.

The computer came with Mountain Lion pre-installed (its a Late 2013 iMac, 802.11ac Haswell). Maybe thats why Micro Center had it priced at $999 :)
 
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PingFixer

Hi guys,

I made this small app to resolve the variable ping issue. https://gum.co/PingFixer

It basically does the workaround that is mentioned in various online forums, but it's packed up nicely and does some other things to make sure you're actually keeping the wifi card awake.

Kevin
 
Last edited:
Ethernet cable:
Image

wi-fi from Apple Time Capsule 5g network. The Time Capsule is under my desk, less than 3ft from the iMac:
Image

D-Link router 8ft away in same room as iMac:
Image

This is why I don’t use wi-fi with my iMac - except for Time Machine backups…

Found this thread looking for some answers on my latency issue with a 2013 Time Capsule and 2013 iMac...

After seeing your internet speeds I think to myself - my god, the broadband in the United States is straight PATHETIC! And here these companies are, Verizon, Comcast, Cablevision, Time Warner, all touting 30mbps like its something exclusive.

/sigh
 
Add me to the 2013 iMac wireless AC issue list. My story is below:

I recently picked up a current gen 2TB Time Capsule so that I could retire the Airport Express and 1TB USB disk I use to cart along between my iMac and my wife's Mac mini for periodic Time Machine backups. Figured I could replace both of those units with one that "just works", that way I won't forget to run a Time Machine backup.

I was excited about the additional features that wireless AC would bring too - particularly with the Time Capsule disk and theoretical transfer speeds.

Once I got everything up and running for nearly 2 weeks now, I found that performance has been pretty dismal for me. I am about 20 feet away from the router (I could run a wired connect, I know, but I prefer not to since I currently rent and I'd rather not start tacking things to the molding, etc.)

My wife's 2012 Mac Mini located in the other room (this is a small apartment, about 700 square feet) is having zero issues whatsoever. Her machine is only capable of wireless N ;)

I began to notice the occasional lag while simply browsing the Internet as compared to my previous 2012 Airport Express. I figured it was just the time of day as Comcast tends to get bogged down like most copper wire providers.

However, I noticed the most lag when playing World of Warcraft - something that never happens to me. My latency would shoot up to 800ms on the regular! :eek:

I decided to troubleshoot EVERYTHING. I reset the Time Capsule, reset the modem, reinstalled firmware. Reinstalled the latest combo update on my iMac, performed an SMC and VRAM reset, and probably did several other things too. Took up a good portion of my night, but it had to be done :mad:

Finally I thought to myself, lets try and determine if this issue is wifi exclusive or if this router is defective. :confused:

So I ran a wired connection and sure enough, my latency stayed right around 30ms for quite awhile (in retrospect, I should have done this first before going crazy resetting every single thing).

Since I would much prefer to stay wireless, I decided to try and run off of the 2.4ghz frequency as opposed to the 5ghz frequency to continue troubleshooting some of the wifi settings.

Sure enough - problem solved. While my latency isn't the best, it has stayed on average at 100ms without any noticeable lag while playing.

I hope this issue can be resolved via software/firmware updates and that my experience sheds some light on any issues other members are having.

Thanks!

John
 
Hi guys,

I made this small app to resolve the variable ping issue. https://gum.co/PingFixer

It basically does the workaround that is mentioned in various online forums, but it's packed up nicely and does some other things to make sure you're actually keeping the wifi card awake.

Kevin

$10 for 1 MB code ? no thanks and goodluck.
 
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