Mountain lion wireless problems

My iMac and MacBook Pro have been dropping wireless connection to Internet since latest update to Mountain Lion. I've not had same problem with my iPad.

Hi, this has worked for a few...
Make a New Location, Using network locations in Mac OS X ...
http://support.apple.com/kb/HT2712
10.7…
System Preferences>Network, top of window>Locations>Edit Locations, little plus icon, give it a name.
10.5.x/10.6.x/10.7.x instructions...
System Preferences>Network, click on the little gear at the bottom next to the + & - icons, (unlock lock first if locked), choose Set Service Order.
The interface that connects to the Internet should be dragged to the top of the list.
Instead of joining your Network from the list, click the WiFi icon at the top, and click join other network. Fill in everything as needed.
For 10.5/10.6, System Preferences>Network, unlock the lock if need be, highlight the Interface you use to connect to Internet, click on the advanced button, click on the DNS tab, click on the little plus icon, then add these numbers...
208.67.222.222
208.67.220.220
Click OK.
Also, turn off IPv6:
System Preferences » Network » AirPort » TCP/IP tab » Configure IPv6
Or whatever Interface you use.

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After a long in "stop" period, the internet connection (ethernet) doesn't work. before updating to mountain lion this problem didn't exist.

after a long in "stop" period, the internet connection (ethernet) doesn't work. before updating to mountain lion this problem didn't exist.

Gave up on the GUI. This script derived from http://blog.netnerds.net/2012/07/os-x-how-to-setup-nat-on-lion-and-mountain-lion / seems to work for me:
gwdev=en0 # This is my WiFi connection (has Internet connection)
targetdev=en1 # This is the USB to Ethernet adapter (to give Internet connection)
/sbin/ifconfig $targetdev down
/sbin/ifconfig bridge0 create
/sbin/ifconfig bridge0 up
/sbin/ifconfig bridge0 addm $gwdev
/sbin/ifconfig bridge0 $HOST_ADDR
/sbin/route add default -interface bridge0 -ifscope bridge0 -cloning
/usr/sbin/sysctl -w net.inet.ip.forwarding=1
/sbin/ipfw add 100 divert natd ip from any to any via $gwdev
/usr/sbin/natd -interface $gwdev -use_sockets -same_ports -unregistered_only -dynamic -clamp_mss -enable_natportmap -natportmap_interface $targetdev

I have a MacBook early 2008 running OS X Lion 10.7.5 (11G63). Could I upgrade to Mountain Lion without problems?

I have a MacBook early 2008 running OS X Lion 10.7.5 (11G63). Could I upgrade to Mountain Lion without problems?

No... the specs are
MacBook (Late 2008 Aluminum, or Early 2009 or newer)
http://www.apple.com/osx/specs/

Mountain Lion WiFi Problems (recap)

Folks, wanted to recap this as I am finding the problem much more broad than my original post (here: https://discussions.apple.com/message/19123146#19123146). Here's my setup:
MacBook Air 13", Mid 2011
Mountain Lion
Wifi Problems, cannot connect to open wi-fi and Sprint hot spot.
CAN connect to Time Capsule (at least I could before I started futzing with my setup while on the road)
here's what I've done so far:
Reset SMC
Zapped PRAM
Reduced MTU to 1300
Set hotspot to 802.11g only
Set IPv6 to Local-link only
Set up a new user account, no connection there either
Repair disk
Repair disk permissions
Removed WiFi in networking control panel and re-add.
Remove the network from control panel AND remove keys from Keychain
What I have not done but will try later:
Reinstall ML
Disable WMM
Observations:
ML seems to think there is a connection to the wi-fi, but it can never get an IP address
Using a static IP on the network doesn't help the problem
My hotspot never really registers the MBA as a connection

Tell you what worked for me .. finally.
Had two Apple technicians on the case - over the phone. Have to say, those guys are awesome! - with patience of saints! But to the point! As there was nothing obviously wrong with operating system, they promised to call me back the following day but suggested talking to my Internet Service Provider about the router (D-Link router). The ISP remoted to my iMac and logged into router site and changed channel selection from automatic to manual. He chose channel 13, and suddenly my MBA connected and has been connecting smoothly ever since. The reasons I had problems was that there was over 10 available wi-fi networks in my flat, some of which showed as having stronger signal than my own. The ISP guy told me this, increasingly, becomes and issue, especially in blocks of flats - the ether is filled with wi-fi networks to the point of saturation. He also said, his choice of channel 13 was just a fluke and it might turn out I'd have to change it again.
So, although the problem is now solved, there still remains this one nagging question: Why did the wi-fi connectivity zonked right after Mountain Lion upgrade?

Mountain lion connection problems:

Here is the set up.
We were once an all PC office, but as the PC's have been biting the dust, we've installed Macs. One of the two remaining PC's died, so we installed a new Mac mini in it's place.
Now, this Mac Mini is the only Mountain Lion machine in the office. It is hooked to the intranet, and can see and interact with the Internet. BUT, I've tried to do two things unsuccessfully:
1) Connect to our internal image server which is an older X-Serve (Quad core Xeon) running 10.6.8
2) Make contact with my Remote Desktop (running the most current version--updated earlier today) from my Mac Pro running 10.7.5
The first goal was # 2, as I'm travelling, and can't sit at the machine itself. But, I've verified that all of the network settings, the sharing settings etc, are all identical on the Mountain lion machine as they are on the Lion and Snow Leopard machines that connect just fine and can be controlled just fine.
I gather that Mountain lion is different enough that there must be some other default setting that needs to be adjusted. Suggestions please!!
Thanks in advance.
Adam

I'm having similar problems with a 2012 13" MacBook Air. It's brand new, came installed with Mountain Lion.
I get disconnected from the wireless randomly and the wireless icons turns gray. Like you, I have an iPad, multiple computers and they all work fine.
Instead of restarting the router, I go into Safari and do a network diagnostics and it picks up the connection easily enough.
No solution as of yet, but I posted a topic here if you want to follow it:
http://forums.macrumors.com/showthread.php?p=15435867

Mountain Lion wifi problems?

Hi there, Not sure if this is the right post for this but I am running a 15" MBP Retina with Mountain Lion, all of my software is up-to-date.
This evening I was on my home wifi like normal, and my computer all of the sudden dropped the connection.Other wifi connections were still showing up in the dropdown and Both my wife and I's iphones were still connected to the home wifi. I figured the router needed to be reset so I did that, and no change.
I've tried manually "Join Other Network" and still nothing, I've cleared my preferred networks list and then re-added the home wifi to the list, still nothing. Ran a scan to make sure it wasn't a spyware bug or something like that, nothing. From what I understand this issue is pretty common with Lion and Mountain Lion.
Can anyone help? I'd prefer to not have to go in and change my router settings as that isn't really fixing the problem, it sounds like its in the Lion software, wondering if there are any other fixes to this problem?
Thank you in advance!

Maybe these will help:
Troubleshooting Wi-Fi issues in OS X
Wireless Connection Problems - Fix

Do i have a virus, or is it just Mountain Lion teething problems?

Ever since i upgraded to Mountain Lion, it has impressed me, but also shocked me. It has some really useful features, and looks beautiful, but i cant help wondering if Apple is loosing it's touch, when it behaves like Windows Vista. The first problem was that it randomly kept restarting whilst in sleep, whick causes lots of problems. That has stopped now, but the are even worse problems. Web based application ofthen crash and are unresponsive, and it denies the existance of my Air port, which it is connected to, which keeps all the backups. Also, I recently noticed a Java DMG in Disk utility, but it wasn't in finder, when i looked, so i ejected it using disk utility. These are all tell tale signs of a virus, however, it also claims that the bootcamp partition doesn't exist, (yet i can still boot from it, and use windows), and also it told me that it couldn't eject Macintosh HD, because itunes was using it. Why would I ask my best computer to commit suicide? Also, when i connect my portable hard drive to it, it doesnt show up, but if i connect it in Windows or on another Mac, it works fine. So, it's either a virus, a reliability issue in Mountain Lion, Please help.

You don't have a "virus." That's the Windows way of thinking. You have a misconfigured system. What exactly happens when web-based applications crash?

Logic 9 + Mountain Lion = Performance Problems

Hi,
After months of debating to upgrade to Mountain Lion, I did it (and regret it like iOS 6).
I'm just wondering if anyone gets the issue with Logic 9, where it works for around an hour no problems, then the CPU meter goes mental and causes glitching in the audio no matter what I/O buffer size I choose, or what sample rate my projects in, OR how many plugins/instruments I have open?
It's really starting to affect my clients as to solve the problem the OS needs a full reboot.
I am fully updated in Software Update and it worked perfectly until Mountain Lion.
Hope there is a solution!
Tim

Your question is too vague... More details are required...

Mountain Lion download problems with Lion 10.7.5 (no VirusBarrier issue)

I have a mid-2009 Macbook Pro. From the factory it came with Snow Leopard but has since been upgraded to Lion OS X 10.7.5. I do not have VirusBarrier, I am writing from a recently clean-installed Lion.
I have now been troubleshooting my Mac for several days. When I wrote first, I had an issue with Safari having been damaged and so I wasn't able to reinstall Lion - but after a certain extremely helpful community member I finally succeeded in installing Lion.
But the issues with the App Store still persist. All my Mountain Lion downloads fail, getting the error message "can't verify, might be corrupted" what many here have also been getting. However, most solutions were related to VirusBarrier (which I don't have), or /var/folders errors (Console does not show any var-related errors).
So if it's not a var-related issue, or related to firewalls or virus softwares (I have disabled the Firewall and I have no virus software installed), what could it be?
When the download and install of ML failed last time, Console showed the following messages:
11/30/12 11:54:44.617 AM com.apple.SecurityServer: Failed to authorize right 'system.install.app-store-software' by client '/System/Library/PrivateFrameworks/PackageKit.framework/Versions/A/Resources/in stalld' [235] for authorization created by '/System/Library/CoreServices/Software Update.app' [567]
11/30/12 11:54:44.617 AM com.apple.SecurityServer: Failed to authorize right 'system.install.software' by client '/System/Library/PrivateFrameworks/PackageKit.framework/Versions/A/Resources/in stalld' [235] for authorization created by '/System/Library/CoreServices/Software Update.app' [567]
11/30/12 12:25:49.252 PM authexec: executing /Applications/Install OS X Mountain Lion.app/Contents/Resources/InstallAssistantTool
11/30/12 12:26:17.178 PM Install OS X Mountain Lion: Stopped operation queue with Error Domain=IAErrorDomain Code=101 "This copy of the Install OS X Mountain Lion application can't be verified. It may have been corrupted or tampered with during downloading." UserInfo=0x7f93aad17ee0 {IAErrorAlternateAction=App Store, NSLocalizedRecoveryOptions=(
Cancel,
"App Store\U2026"
), NSLocalizedRecoverySuggestion=Delete this copy of the application, and go to the Purchases page of the Mac App Store to download a new copy., NSRecoveryAttempter=<IARecoveryAttempter: 0x7f93aab1e1d0>, NSLocalizedDescription=This copy of the Install OS X Mountain Lion application can't be verified. It may have been corrupted or tampered with during downloading.}
...and a bit later, upon re-starting the download:
11/30/12 12:29:40.515 PM com.apple.SecurityServer: Failed to authorize right 'system.install.apple-software' by client '/System/Library/PrivateFrameworks/PackageKit.framework/Versions/A/Resources/in stalld' [817] for authorization created by '/Applications/App Store.app' [781]
11/30/12 12:29:40.547 PM com.apple.SecurityServer: Failed to authorize right 'system.install.software' by client '/System/Library/PrivateFrameworks/PackageKit.framework/Versions/A/Resources/in stalld' [817] for authorization created by '/Applications/App Store.app' [781]
Problem elimination:
* I don't think this is a router-related issue: I have downloaded and installed other softwares outside App Store successfully
* As said, I don't think this has anything to do with Firewall or Virus settings
* Nor has this anything to do with /var/folders as far as I can tell
What I've tried so far:
* Repaired disk permissions several times
* Rebooted
* Restarted App Store
* Following one advise found on the net, I deleted preflight.pfpkg just in case
* All the time I have made sure my OS has the most recent Software Updates installed (most of them downloaded successfully, while with Safari and OS 10.7.5. I had to try several times before they were downloaded succesfully)
I just reinstalled my OS X Lion, only to use it to jump on to Mountain Lion - so I am pending my migration until ML is installed. I would like to fix this soon, since I'd like to get the migration done and my real work started. I would really appreciate your help.
I'm not very adept at using Console or Terminal to troubleshoot, so if someone could guide me through the problem identification, that would be great. Unless someone already knows exactly what's going wrong and can show me a working solution - that'd save my day!
Thanks!

In cases like this, if you have an Apple store near by, they will most likely install the OS free of charge for you, if you can't bring your Apple ID along to prove you've paid for it.
Would that work out for you?

Mountain Lion download problem

I have been trying to download Mountain Lion for about 5 hours now and I keep getting errors saying the download cannot be completed. The last error I recieved was The download could not be completed becasue of a Hash Mismatch Error.
A download of about 4GB of data on my Internet Connection would usually take about 1 hour.
If I do get to succesfully download the Installer will the Installation begin automatically or is it started manually. I would prefer manually so I can make a backup copy first.
Christo
I am on a Late 2011 13' Macbook Pro, OsX 10.7.5

Contacted Apple Store Tech support requesting a solution. I received a reply from a gentleman telling me his area of expertise and that this problems didn't fit in his area of expertise and suggested I look on online forums and the like for a solution!!
All I have found out is this is a very common problem
Thanks for http://www.apple.com/support/mac/app-store/contact.html?form=account. Have not received a reply from Apple after 48 Hours.
I have tried:
Logging out and back onto the Online Store
Deleting the Apple Store cache on my HD
Connecting via an Ethernet cable instead of WI-FI
Using my iPhone 3G Data, teathered
Connecting via a totally different network
Restarting, restarting, restarting...
Nothing has worked. And still no solutions from Apple. I kinda of thought they might have suggested I go into a real Apple store and have them put a copy on my Mac or something.

HT202159 OSX Mountain Lion download problems

Hello,
I have been trying to download OSX Mountain Lion from the appstore on my 10.6.8 mac mini but the file stops downloading after about 10mb. I was able to download 10.7 without any problems but I am not able to downlaod 10.8 on either of my two machines. Both stop at about 10mb. Anyone seen this or have any possible solutions?
Thanks!
Travis

I have seen this, unfortunately there are 100 & 1 different things that can cause this. If you want to trouble shoot, let's power-cycle both your modem and router and see how that goes.

Osx mountain lion purchase problem

Hey , i have a problem purchasing os x mountain lion from apple store. Whenever i hit Buy button, and after entering my password, it redirects me to the billing info page. by the way, i dont have a payment method set. The method i will use for the purchase is by itunes gift card. after that i get the password requirement again and when i enter it, the os doesnt get purchased and everything keeps happening again and again. whats the problem here? the app goes for 19.99 and i have about 20$ so i have enough credit for the os.
Help please.

Don't know if you're in the US, but the MAS charges tax on purchases here and that would mean there's not enough credit on your account.

Mountain Lion Install Problems

Hello, everyone! I (obviously) recently bought Mountain Lion (or ML) and am having problems. I have looked around for support, but to no avail.
Here's the problem:
When I installed ML from the App Store, it took time to download, and I was excited for the install! When I opened it up, I agreed to the liscence agreement, and pressed next. When I clicked on the Macintosh HD, it (to the left of the Macintosh HD) said, "This disk cannot be used to start up your computer." I pressed back, then next, and the popup was still there, and under OSX Mountain Lion it said, "OS X cannot be installed on 'Macintosh HD'." I am frustrated, and have been searching for the solution today, and no one has the same problem.
Side Note - Disk Utility was looked at, and I tried to verify the disk, and its permissions, and it told me to repair it, and I had to stop it at one point. I am very cautious and careful about my data! Please help me, and be nice! Thanks.
-Vemir
P.S. If you need any information about my MacBook Pro, please let me know, and where the information is. I checked the compatibility list for ML, and it seems to check out. I also completed any software updates. Thanks again!

Anyone having a problem installing Mountain Lion becasue youget an error that this disk is used for Time Machine backup then you should follow the instructions at this link:http://support.apple.com/kb/TS2986
If the spot light search does not find backups.backupdb folder then Click on Finder menu the tool bar then open preferences. Click on Sidebar icon at the top and under Devices to check the box next to your machine name. Now open finder, under devices, click on your machine name. You should now see the backups.backupdb folder. Follow the instruction from aboe link and you should be good to go. Good Luck!

After Mountain Lion update - problems synching contacts and accessing previous Time Machine backup

I have just set up a MacBoook Pro with a new SSD drive to replace the internal hard drive. I made sure I had a current Time Machine then connected the SSD drive externally and installed Mountain Lion. I installed the SSD drive into the computer. Before restoring applications from the Time Machine backup, I enabled the root user, logged on as that and deleted all other accounts as I have previously had issues with creating a new account from a backup and making that the 'home' user.
All went well except that a few seconds after I opened Contacts they all disappeared. They were replaced with two entries - one for Apple and one with the name of the home account.
I tried to retrieve Contacts from the Time Machine backup. I could see all the past dates but they were all red and inaccessible.
I looked at Contacts in my account at iCloud.com - they were the same 2 contacts as my local machine. I went through the installation process again but made sure that there was no connection to the Internet on completion. My contacts were intact. I exported them to a file and turned on the Internet. A few seconds later, my Contacts were gone..!
I imported from the backup I had made but, after a few seconds they were replaced with the two contacts from iCloud. Nothing I tried would allow me to add the contacts and have them synch to iCloud. I finally found a workaround:
1 disconnect from the Internet
2 import Contacts from the export file
3 select all contacts (ctrl-A) and drag them to the 'on my mac' account in Contacts
4 connect the Internet and watch all the contacts disappear from the iCloud account
5 select all contacts from the 'on my mac' account adn drag them to the iCloud account.
6 watch them synch to iCloud
I still don't understand the problem - perhaps someone can enlighten me - but here's the workaround if someone is having the same problem.
And I still can't access the Time Machine backup that I used to setup the MacBook Pro. Looking at the files within the Time Machine the backup. it looks as though it is probably a permissions issue but I don't see why as the account I am using is the same name as the one used to create the backup. Any guidance would be appreciated.
Jeff

I think you went about this the wrong way. ok....
Could you please try this... (1) Open Address Book - keep it as the main window. (2) Enter Time Machine from the icon in the menu bar... do you have that icon? If not, Open System Preferences, Click Time Machine, put a check mark in Show Time Machine in Menu bar. Close System Preferences. Go back to your addressbook. Make it the primary application open. Now go to the icon in the menu bar that represents TimeMachine and click Enter Timemachine. You should see your stuff...
if you dont...
I would also try...
Open system preferenes. go to the icloud tab. sign out. then sign in.
jdxxs wrote:
I have just set up a MacBoook Pro with a new SSD drive to replace the internal hard drive. I made sure I had a current Time Machine then connected the SSD drive externally and installed Mountain Lion. I installed the SSD drive into the computer. Before restoring applications from the Time Machine backup, I enabled the root user, logged on as that and deleted all other accounts as I have previously had issues with creating a new account from a backup and making that the 'home' user.
All went well except that a few seconds after I opened Contacts they all disappeared. They were replaced with two entries - one for Apple and one with the name of the home account.
I tried to retrieve Contacts from the Time Machine backup. I could see all the past dates but they were all red and inaccessible.
I looked at Contacts in my account at iCloud.com - they were the same 2 contacts as my local machine. I went through the installation process again but made sure that there was no connection to the Internet on completion. My contacts were intact. I exported them to a file and turned on the Internet. A few seconds later, my Contacts were gone..!
I imported from the backup I had made but, after a few seconds they were replaced with the two contacts from iCloud. Nothing I tried would allow me to add the contacts and have them synch to iCloud. I finally found a workaround:
1 disconnect from the Internet
2 import Contacts from the export file
3 select all contacts (ctrl-A) and drag them to the 'on my mac' account in Contacts
4 connect the Internet and watch all the contacts disappear from the iCloud account
5 select all contacts from the 'on my mac' account adn drag them to the iCloud account.
6 watch them synch to iCloud
I still don't understand the problem - perhaps someone can enlighten me - but here's the workaround if someone is having the same problem.
And I still can't access the Time Machine backup that I used to setup the MacBook Pro. Looking at the files within the Time Machine the backup. it looks as though it is probably a permissions issue but I don't see why as the account I am using is the same name as the one used to create the backup. Any guidance would be appreciated.
Jeff

Mountain Lion Downloading Problem!

Mountain Lion is not downloading.I dont know whats the problem, the internets working perfectly fine but the downloading bar is absolutely stationary.Anyone facng similar issue? Help please!

When I install OS X Mountain Lion this is the error I get: This copy of the Install OS X Mountain Lion application can't be verified. It may have been corrupted or tampered with during downloading. - Delete this copy of the application, and go to the Purchases page of the Mac App Store to download a new copy.
This is a free upgrade with my purchase of the new rMBP.
I deleted it completely, even from the Trash. I also cleaned my Mac.
When I try to download it from the app store the error shows: The application could not be downloaded. - The installation could not be started. But it's not in the trash anymore. It's totally gone... What else could be the problem?
What should I do? Please help... Thanks.

Mountain lion wireless problems

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