OSX v 10.13.1 5Ghz problem

[jtkeep]

After an update i have lost my 5Ghz chanels over 48 on my airbook air
om my imac all chanels are suported
in systems rapport.
These high 5Ghz chanels were there on my airbook
before the security update.
Hoping som one can give advice on this

 

[ferrarr]

It looks like macOS High Sierra (10.13) is up to 10.13.6 now. Maybe a different update will help? See here, Apple - Support - Downloads.

 

[jasongoldworthy]

just a quick question if he has had an update shouldn't it have put him on 10.13.6 ???


or am I missing something ?

 

[jtkeep]

just a quick question if he has had an update shouldn't it have put him on 10.13.6 ???


or am I missing something ?

Hi guys Thanks for your replys.
Before the security update i was on
Siera on that version before update
i had all 5ghz wifi chanels even the
high ones over 100 now only up to
48 my imac is also on high siera
and has all 5 ghz chanels i am
now doing a backup on time capsule
and doing a clean install would you
recomend this to solve the problem?

 

[IWT]

@jtkeep

May I crave your indulgence, please?

macOS Sierra is 10.12.x
macOS High Sierra is 10.13.x

So I'm, not clear which OS you are currently running and also wondering whether you are confusing an Update with an Upgrade? For example, you said that "before the the security update I was on Sierra" ie 10.12.x; but your header said "OSX v 10.13.1.....problem".

May we start again? Exactly which OS are you running? Sierra (10.12.x, the last version of which was 10.12.6) or High Sierra (10.13.x, the latest version is 10.13.6)?

Then we can happily address your WiFi problem.

Ian

 

[pm-r]

@jtkeep
Maybe have a good read here:
How to use MacOS Wireless Diagnostics to get the best possible Wi-Fi settings in your area
How to use MacOS Wireless Diagnostics to get the best possible Wi-Fi settings in your area | iMore

Or, maybe take a look at some of the appropriate hits from here:
mac 5ghz wifi chanels - Google Searchhttps://www.google.com/search?q=mac...i57j69i64l3.6526j0j4&sourceid=chrome&ie=UTF-8




- Patrick
======

 

[jtkeep]

@jtkeep

May I crave your indulgence, please?

macOS Sierra is 10.12.x
macOS High Sierra is 10.13.x

So I'm, not clear which OS you are currently running and also wondering whether you are confusing an Update with an Upgrade? For example, you said that "before the the security update I was on Sierra" ie 10.12.x; but your header said "OSX v 10.13.1.....problem".

May we start again? Exactly which OS are you running? Sierra (10.12.x, the last version of which was 10.12.6) or High Sierra (10.13.x, the latest version is 10.13.6)?

Then we can happily address your WiFi problem.

Ian

Hi Ian
I am on 10.13.1 which i downloaded from apple
maybe i should update to 10.13.6 but i have found
the problem i changed from adsl to fiber a week ago
the new router is transmitting land code EU the old
router had land code DK for Denmark where i live.
In my new router i can not change land code,
the EU land code reduces my chanels in 5 ghz to
highest 48 i dont know if i can get my airbook to
change the land code?

 

[MacInWin]

I don't think the land code has anything to do with it. The way 5ghz works is that the channels are in bands, and you need a transmitter capable of transmitting the frequency of the band to have the band available. Some routers don't offer all bands because the frequencies conflict with weather radars and are therefore subject to significant governmental regulation about indoor/outdoor/power. Apparently yours is one of those. The choice is probably to comply with EU regulations on what frequencies can be used in WiFi. Here is a rather technical wikipedia article on the whole subject:

EDIT: The board is not letting me post the link. You can search for "list of wlan channels" and find the article.

 

[IWT]

List of WLAN channels - Wikipedia

Ian

 

[MacInWin]

Ian, thanks. Wonder why when I posted the link it disappeared, twice. Oh, well, chalk it up to random cosmic rays...

 

[jtkeep]

I don't think the land code has anything to do with it. The way 5ghz works is that the channels are in bands, and you need a transmitter capable of transmitting the frequency of the band to have the band available. Some routers don't offer all bands because the frequencies conflict with weather radars and are therefore subject to significant governmental regulation about indoor/outdoor/power. Apparently yours is one of those. The choice is probably to comply with EU regulations on what frequencies can be used in WiFi. Here is a rather technical wikipedia article on the whole subject:

EDIT: The board is not letting me post the link. You can search for "list of wlan channels" and find the article.

Hi its only on my airbook i dont have channels 5ghz over 48
the router is transmitting channels up to 140 these are
available on my imac iphone ipad, before you tell me
the airbook had these channels before the new router.

 

[MacInWin]

How do you know the MacBook Air is only seeing up to 48? Where are you seeing that? How are you seeing the channels on the iMac, iPhone, iPad? On my MacBook Pro, when I run the System report from the  logo>About This Mac, under Network/Wifi I see that the system supports a full range of channels up to 165, but my router only uses up to 48, so I am limited by the router to those. So what does your system report when you look there?

 

[jtkeep]

How do you know the MacBook Air is only seeing up to 48? Where are you seeing that? How are you seeing the channels on the iMac, iPhone, iPad? On my MacBook Pro, when I run the System report from the  logo>About This Mac, under Network/Wifi I see that the system supports a full range of channels up to 165, but my router only uses up to 48, so I am limited by the router to those. So what does your system report when you look there?

Hi Jake
I use Wifi explorer for mac this shows which channels
i can see, also have done a wifi diagnostic, if i try to
to use a router on a high 5ghz over 48 it can not see
this in network, but these can be seen on my imac
on same version osx as my macbook, all this has been
working for 3 years before with channels up to 140 on
my macbook

 

[MacInWin]

What shows up when you click on the , About this Mac, then System Report under the WiFi listing? That is where you see what the hardware can use. All Wifi explorer shows is signals strong enough, and their associated channels. You seem to be implying that somehow the software update limited the channels, so what does the hardware report say? Here is what is in my report in that area:

Interfaces:
en0:
Card Type: AirPort Extreme (0x14E4, 0x152)
Firmware Version: Broadcom BCM43xx 1.0 (7.77.61.2 AirPortDriverBrcmNIC-1305.8)
MAC Address:
Locale: FCC
Country Code: US
Supported PHY Modes: 802.11 a/b/g/n/ac
Supported Channels: 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 36, 40, 44, 48, 52, 56, 60, 64, 100, 104, 108, 112, 116, 120, 124, 128, 132, 136, 140, 144, 149, 153, 157, 161, 165

As you can see, channels up to 165 are supported. So what does that report say for your MBA?

 

[Rod]

AND as an aside I would be updating your macOS 10.13.1 to 10.13.6 in any case as it may well turn out to be a glitch related to the first version of High Sierra.
Given that I am running macOS 10.14.6 it's difficult to draw comparisons but in my System Report;

Interfaces:
en0:
Card Type: AirPort Extreme (0x14E4, 0x133)
Firmware Version: Broadcom BCM43xx 1.0 (7.77.61.2 AirPortDriverBrcmNIC-1305.8)
MAC Address: 98:017:9b:d6:37
Locale: ETSI
Country Code: US
Supported PHY Modes: 802.11 a/b/g/n/ac
Supported Channels: 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 36, 40, 44, 48, 52, 56, 60, 64, 100, 104, 108, 112, 116, 120, 124, 128, 132, 136, 140, 144, 149, 153, 157, 161, 165
Wake On Wireless: Supported
AirDrop: Supported
AirDrop Channel: 149
Auto Unlock: Supported
Status: Connected

You can see that my WiFi supports 1-165 channels on my 2015 MacBook Pro. I would trust this result over WiFi Explorer and you haven't told us what your System Report says.
Lastly which Version of WiFi Explorer are you using, the current 64bit version is 2.6
Its possible that if you upgraded to High Sierra and opted to change your filing system from the old HFS+ to APFS as most of us did some of your old software may not be operating properly or even be compatible any more.

 

[jtkeep]

What shows up when you click on the , About this Mac, then System Report under the WiFi listing? That is where you see what the hardware can use. All Wifi explorer shows is signals strong enough, and their associated channels. You seem to be implying that somehow the software update limited the channels, so what does the hardware report say? Here is what is in my report in that area:
As you can see, channels up to 165 are supported. So what does that report say for your MBA?

Hi guys
I have updated to 10.13.6 still the same my system rapport under wifi
says supported channels 1,2,3,4,5,6,7,8,9,10,11,12,13,36,40,44,48
Lande code EU
this was not the case before the new router came i dont think it has to do
with an apple update.

 

[MacInWin]

That report says that your hardware only supports up to channel 48. The other channels are on frequencies that your MBA does not have any hardware to receive. That's why it only sees up to 48.

On another topic, why is this critical? Do you have issues with WiFi, or is it just that you think something has changed?

What MBA is it ( About This Mac will tell you what Mac it is)? Maybe somebody with the same hardware can check what channels they have to see that it is the same.

 

[jtkeep]

That report says that your hardware only supports up to channel 48. The other channels are on frequencies that your MBA does not have any hardware to receive. That's why it only sees up to 48.

On another topic, why is this critical? Do you have issues with WiFi, or is it just that you think something has changed?

What MBA is it ( About This Mac will tell you what Mac it is)? Maybe somebody with the same hardware can check what channels they have to see that it is the same.

Hi Jake
The same hardware a MB air from middel 2011 it worked fine 10 days ago
it could see 5 ghz up to channel 140 i have not changed my hardware only
my internet fiber router thats when the problem started, the router is supplied
by my internet provider, i have ringed to them but they have not replied yet.

 

[chscag]

Did your new router come with instructions on how to enter the firmware setup? If it did, you may be able to enter the router and activate those higher channels.

Internet providers typically issue a router with firmware that is for their network. Many times options such as DNS and channels are preset to their specs. Most routers, even those that are proprietary can be entered through their firmware password and changes can be made. Some, however, are fixed and can not be changed by the user.

 

[jtkeep]

Did your new router come with instructions on how to enter the firmware setup? If it did, you may be able to enter the router and activate those higher channels.

Internet providers typically issue a router with firmware that is for their network. Many times options such as DNS and channels are preset to their specs. Most routers, even those that are proprietary can be entered through their firmware password and changes can be made. Some, however, are fixed and can not be changed by the user.

Hi no instruction to be able to go in to the firmware
the router is suplied by the national Danish tele company
they are a very closed support, had a long talk with a support
person who did not know anything about land codes on a mac book
he just told me its my mac books fault, it worked fine before with
the old router i told him but no its my mac book.
I have done a wifi diagnostic on my mac book it reports
there is a conflict with the land codes, so what to do, it
tells me to contact the owner of the conflicting router,
its my new fiber router for my internet no router no internet,