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kybldmstr

macrumors 6502a
Original poster
Oct 12, 2011
786
380
New Orleans, LA
Ever since updating to 10.11.1 beta I cannot connect to any WPA2 Enterprise networks. Has anyone else experienced this or know of a fix????
 

kheowkul

macrumors newbie
Sep 4, 2010
26
17
Yes had the same on on the early betas and also on gm. Found no fix unfortunately
 

beebarb

macrumors 6502
Sep 10, 2015
288
258
Something I recall from the seeing the release notes for the developer betas thanks to some sites I frequent:
"When negotiating a TLS/SSL connection with Diffie-Hellman key exchange,
OS X El Capitan requires a 1024-bit group or larger.
OS X El Capitan will not connect to a server that allows negotiation with a 512-bit or smaller group.
These connections include:
⁃ Secure Web (HTTPS)
Enterprise Wi-Fi (802.1X)
⁃ Secure e-mail (IMAP, POP, SMTP)
⁃ Printing servers (IPPS)"

Your Enterprise network security may simply be insufficient as far as El Capitan is concerned.
 

kybldmstr

macrumors 6502a
Original poster
Oct 12, 2011
786
380
New Orleans, LA
Yes had the same on on the early betas and also on gm. Found no fix unfortunately

SOLVED!!!! I just had to reset my PRAM. Follow these steps:

1) Shut down computer
2) Turn on computer
3) Hold down command, option, p, and r keys
4) Release keys after power on sound and apple logo appears

As soon as I logged in my mac immediately logged into my school's WPA2 Enterprise network
 

kheowkul

macrumors newbie
Sep 4, 2010
26
17
SOLVED!!!! I just had to reset my PRAM. Follow these steps:

1) Shut down computer
2) Turn on computer
3) Hold down command, option, p, and r keys
4) Release keys after power on sound and apple logo appears

As soon as I logged in my mac immediately logged into my school's WPA2 Enterprise network
Will try it tomorrow at the office where I had the problem with wpa2 network. hope it works as its the only reason I can't update to El Cap
 

Shirasaki

macrumors P6
May 16, 2015
16,263
11,764
Something I recall from the seeing the release notes for the developer betas thanks to some sites I frequent:
"When negotiating a TLS/SSL connection with Diffie-Hellman key exchange,
OS X El Capitan requires a 1024-bit group or larger.
OS X El Capitan will not connect to a server that allows negotiation with a 512-bit or smaller group.
These connections include:
⁃ Secure Web (HTTPS)
Enterprise Wi-Fi (802.1X)
⁃ Secure e-mail (IMAP, POP, SMTP)
⁃ Printing servers (IPPS)"

Your Enterprise network security may simply be insufficient as far as El Capitan is concerned.
Does this only limited to diffie Hellman key exchange?
 

kheowkul

macrumors newbie
Sep 4, 2010
26
17
Thought it was El Cap specific problem as I had no problems on Yosemite.

This morning though I clean installed Yosemite and had the same issue connecting to WPA2 Enterprise network as I had on El Cap.

Then I found the following solution somewehere online and it worked for fixing it on Yosemite so perhaps it also works for El Cap.

Open Finder > Choose Go From the menu at the top of the screen > Click on Computer > Double Click on Macintosh HD > Double Click on Library > Double Click on Preferences > Click once on the file called "SystemConfirguration" > CMD+DEL the file > Enter your password > restart.
 

RiverBranch

macrumors newbie
Nov 16, 2017
1
0
SOLVED!!!! I just had to reset my PRAM. Follow these steps:

1) Shut down computer
2) Turn on computer
3) Hold down command, option, p, and r keys
4) Release keys after power on sound and apple logo appears

As soon as I logged in my mac immediately logged into my school's WPA2 Enterprise network



Thanks, Just reset My Pram which is apparently short-term ram (Storage) This fixed the issue I was having where it brought up a screen when I tried to connect that said I couldn't connect to the WPA2 network and it wanted me to run diagnostics. Basically just powered down help command, option, p, and r as I booted up my MacBook. It works! I'm running MacOS Sierra - version 10.12.6

I am at a college and my wifi worked everywhere besides at the campus.... the technician here didn't know what was wrong and basically told me it wasn't a problem with the network so basically, it was my laptop. Either way, I'm beginning to learn that A, I always have to fix problems myself, and B, that 90% of mac problems are solved with fancy reboots haha.... Good luck!
 

kybldmstr

macrumors 6502a
Original poster
Oct 12, 2011
786
380
New Orleans, LA
Thanks, Just reset My Pram which is apparently short-term ram (Storage) This fixed the issue I was having where it brought up a screen when I tried to connect that said I couldn't connect to the WPA2 network and it wanted me to run diagnostics. Basically just powered down help command, option, p, and r as I booted up my MacBook. It works! I'm running MacOS Sierra - version 10.12.6

I am at a college and my wifi worked everywhere besides at the campus.... the technician here didn't know what was wrong and basically told me it wasn't a problem with the network so basically, it was my laptop. Either way, I'm beginning to learn that A, I always have to fix problems myself, and B, that 90% of mac problems are solved with fancy reboots haha.... Good luck!
Resetting PRAM solves so many odd problems
 
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