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[cmk1198]

Alright Reinvented.... there are a couple of points you're missing. First of all, 802.11n DOES NOT MEAN 5 GHz operation. 802.11n has support for both 2.4 and 5.2 GHz operation, however most implementations (and the DIR-655 in specific) only support the 2.4 GHz frequencies. 802.11b/g/n all are 2.4 GHz, 802.11a is 5 GHz, but you can find dual-band routers (DIR-855) and wireless network cards. The device in this person's Mac Mini is in fact a dual-band card, the Airport Extreme cards and Airport Express (802.11n version) are dual-band devices as well. Also, I did not tell this person to switch to G only, wireless N exists in both 20 and 40 MHz wide channels, you should probably do some more research or understand what it is you're talking about before getting this kind of attitude. Oh and by the way, I just found this:
http://discussions.apple.com/thread.jspa?threadID=1937911&tstart=135
(The point of this article is that 270 mbps on mac devices is only possible when using dual-band.)

To the person that is trying to find help... Yes, changing the channel width to 20 MHz would mean your other wireless N devices would no longer connect above 130 mbps. If you're getting speeds of anything under 30 mbps (your internet connection speed), something is clearly wrong. Can you please try setting the channel width to 20 MHz from the router? I know this isn't an ideal situation, but it may give you a usable connection from the mini. (You can test LAN and internet performance before and after on PCs and the mac to determine if this will suit your needs.)

[summerstormpictures]

Just to rein this whole thing in minus the rhetoric and to put a solution in the simplest understandable terms:

To possibly achieve better than 130 Mbps, is the consensus expert opinion/suggestion for Macintosh owners to adjust the settings in the DIR-655 as follows in the Manual Wireless Network Setup:

1. Set the Mode to N-Only
2. Enable Auto Channel Scan
3. Set the Transmission Rate to Best (Automatic)
4. Set the Channel Width to Auto 20/40 MHz
5. Set the Security Mode to WPA-Personal
6. Set WPA Mode to WPA2 Only
7. Set Cipher Mode to AES

[Reinvented]

Alright Reinvented.... there are a couple of points you're missing. First of all, 802.11n DOES NOT MEAN 5 GHz operation. 802.11n has support for both 2.4 and 5.2 GHz operation, however most implementations (and the DIR-655 in specific) only support the 2.4 GHz frequencies. 802.11b/g/n all are 2.4 GHz, 802.11a is 5 GHz, but you can find dual-band routers (DIR-855) and wireless network cards. The device in this person's Mac Mini is in fact a dual-band card, the Airport Extreme cards and Airport Express (802.11n version) are dual-band devices as well. Also, I did not tell this person to switch to G only, wireless N exists in both 20 and 40 MHz wide channels, you should probably do some more research or understand what it is you're talking about before getting this kind of attitude. Oh and by the way, I just found this:
http://discussions.apple.com/thread.jspa?threadID=1937911&tstart=135
(The point of this article is that 270 mbps on mac devices is only possible when using dual-band.)

To the person that is trying to find help... Yes, changing the channel width to 20 MHz would mean your other wireless N devices would no longer connect above 130 mbps. If you're getting speeds of anything under 30 mbps (your internet connection speed), something is clearly wrong. Can you please try setting the channel width to 20 MHz from the router? I know this isn't an ideal situation, but it may give you a usable connection from the mini. (You can test LAN and internet performance before and after on PCs and the mac to determine if this will suit your needs.)

Bud, I mentioned NOTHING about 5 GHz.  It's poor firmware on D-Link's side.  Learn to read first before you post.

I know the mechanics of HOW it works.  What you are failing to understand is that it's not some incompatibility, but again as I mentioned earlier, poor software from D-Link.  The fact still remains that regardless of what channel width is set to, he will still have unstable connections on Wireless N.  The purpose of me telling him to switch to G, was that I've found 2.4 GHz G, to be more stable, and more consistent.  He is getting what I was getting on both my 4500 and 655 using Wireless N.  And yes, I have a link speed of 130 Mbps also.  However, the router reported back at 52 or so. 

[cmk1198]

The entire reason for this person's post was to determine the cause of his horrible speeds while under
Mac OS only. Poorly designed firmware has absolutely nothing to do with this issue, and what you're proposing would prevent any connections at wireless N speeds. The fact is to get link speeds higher than 130 mbps on a mac product, you need a dual-band A/N router. Yes, switching to N only, or G only might solve his issues, but his requirement is for all devices to work, G and N alike. In any circumstance his best choice might be to return the 655 for an 855, or just switch to an Apple wireless product.

In most cases I've found that people who call others 'Kid' online, are in fact, children themselves.

[Demonized]

If you want speeds > 130 Mbps you need a NIC that is 20+40 Mhz capable. I don't know if the Mac's have those, but the Intel wireless chipsets support only 20. I think the 5300 does 40 Mhz, but I've heard some pretty terrible storiess about this chipset's connectivity (5100/5300)

[cmk1198]

Demonized,
The issue with speeds greater than 130 mbps on mac actually is a limitation of Mac OS. When people boot to Windows using Boot Camp these same macs are capable of 300 mbps. Just wanted to let you know 

[Demonized]

Thanks...I am not a Mac dude and it shows. 

[summerstormpictures]

...The issue with speeds greater than 130 mbps on mac actually is a limitation of Mac OS. When people boot to Windows using Boot Camp these same macs are capable of 300 mbps.

That's totally insane! I had no idea about this limitation and it boggles my mind why Apple would hamstring wireless in this way. Perhaps Snow Leopard will address and fix this? I very much hope so because this is not cool.

Someone should bring this up to the folks at TekZilla and/or GeekBrief. Perhaps with a little ''bad publicity'' Apple will respond? Maybe post in the Apple tech support forums as well?

[mackworth]

Demonized,
The issue with speeds greater than 130 mbps on mac actually is a limitation of Mac OS. When people boot to Windows using Boot Camp these same macs are capable of 300 mbps. Just wanted to let you know 

Is anyone sure thats actually a limitation or if its just whats reported.

I have a macbook that was the first macbook that had wireless-n.  Its not in front of me, but I am pretty sure that I have my router set to 40only and my macbook and my girlfriends (current generation) both work great with it.

[dbtrader1]

Have you checked the wireless status page on the Dlink side?  I have never gotten anywhere near 300mbps with any macs.  Just because your laptop works great doesn't mean you are realizing the full benefit of wireless n.

cmk1198:  I did try and throttle down to 20mhz and still got no love.

Went out and bought one of the newly released Belkin gigabit over powerline to bypass the wireless all together.  Of course, it seems the outlets I want to use aren't on the same grid so they don't connect.  It seems I'm running out of options here.  Maybe fish line and two tin cans will work     

[cmk1198]

Lol, well, changing the setting to 20 MHz definitely was not a guaranteed fix, I was sort of hoping that this setting on the router was causing some type of incompatibility. About how far away is the router from your Mini? Maybe changing the beacon period, RTS or fragmentation thresholds would have some effect?

[mackworth]

Have you checked the wireless status page on the Dlink side?  I have never gotten anywhere near 300mbps with any macs.  Just because your laptop works great doesn't mean you are realizing the full benefit of wireless n.

cmk1198:  I did try and throttle down to 20mhz and still got no love.

Went out and bought one of the newly released Belkin gigabit over powerline to bypass the wireless all together.  Of course, it seems the outlets I want to use aren't on the same grid so they don't connect.  It seems I'm running out of options here.  Maybe fish line and two tin cans will work     

Yeah, I kind of just figured that if the mac didn't supper 40Mhz, that I couldn't set my router to 40only and still have it work without issue.

[dbtrader1]

I'm going to the Apple store tomorrow with Mac Mini in tow.  Let's see what the Genius Bar has to say about this dilemma. 

Not to point fingers here, but it's ironic how Apple use to cry foul none stop on Microsoft for forcing users to use their products when they were the little guy.  It seems as of late they have taken this play out of the Microsoft book.  Itunes exclusivity is a joke and I've heard from numerous people they are now doing the same thing with Macs.  50 bucks says when I bring this thing in it will work flawlessly with an Airport Extreme.  Will report back on my findings.

[mackworth]

I'm going to the Apple store tomorrow with Mac Mini in tow.  Let's see what the Genius Bar has to say about this dilemma. 

Not to point fingers here, but it's ironic how Apple use to cry foul none stop on Microsoft for forcing users to use their products when they were the little guy.  It seems as of late they have taken this play out of the Microsoft book.  Itunes exclusivity is a joke and I've heard from numerous people they are now doing the same thing with Macs.  50 bucks says when I bring this thing in it will work flawlessly with an Airport Extreme.  Will report back on my findings.

FYI, I have been using macs my whole life.  I used macs in college on wireless, friend houses, I bring it to work now and use on wireless.  I have never had an issue connecting to access points.

This could be a specific problem with your specific mac, but maybe not.  I run a dir-825 running 1.01 and a 655 running 1.31 with no mac issues in a mac heavy environment.

[dbtrader1]

FYI, I have been using macs my whole life.  I used macs in college on wireless, friend houses, I bring it to work now and use on wireless.  I have never had an issue connecting to access points.

This could be a specific problem with your specific mac, but maybe not.  I run a dir-825 running 1.01 and a 655 running 1.31 with no mac issues in a mac heavy environment.

I never said it was a connnection problem.  I can connect with no issue but the speeds are terrible on my Mac Mini and my airport express compared to my PCs. 

I just got back from the Mac store and guess what???  It connected at 30mbps.  Basically they told me it connects fine and I should buy an Airport Extreme becasue it's a better overall router.  Is Dlink or Apple to blame??  A much higher pay grade then mine can decide.