Lion Randomly Freezes

Since "upgrading" to Lion my iMac and my son's MacBook Pro randomly freeze. Neither of the computers had problems. The freezing causes a force shut-down, I have let the iMac sit for hours. Sometimes it will just freeze and others it will just not wake up after sleeping. I have tried zapping P Ram several times, I have reset the SMC several time, neither of which has helped. The freezing conttinues. Nxt step is a clean install of Lion adding each program one at a time and waiting to see if the problem returns or not. A serious pain.
Any other ideas of something else to try.

This morning alone, I have had 4 freezes & restarts while doing routine work. In all the years I have used Apple products (25+) I have NEVER had as much trouble with an upgrade as I am haivng with Lion.
First it was ProTools not being compatible. Then it was and still is MIDI problems with the Audio/MIDI set up, and finally the FREEZES.
What is going on?
I have not added comments to the reports which show up after a restart.
Have gotten nastier as the freezes continue and I have NEVER GOTTEN A REPLY FROM Apple, even what I was polite and civil.
My level of frustrations is growing and my ability to work is diminishing.
WHAT TO DO.......???????????
Can ANYONE advise???
PLEASE............

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Mountain Lion - Random freezes at startup (apple logo)

Hi all
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Boot up holding command-r keys into your Recovery Volume.
The screen should give you these choices...
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First run Disk Utility Repair Disk, if you get errors run until no errors reported or reports "the disk cannot be fixed". Then, choose Reinstall OS X. This will be an install "in place" and shouldn't effect any of your own data or settings.

MBP Mountain Lion randomly freezes every 20/30 mins

MacBook Pro 2.2 Intel Core i7
4G ram
AMD radeon 1gb dedicated = onboard video card.
1T storage, almost all free.
Mountain Lion 10.8.5 fully updated
This is driving me crazy, I tried exiting Chrome, Dropbox, etc, but still happens, it freezes for around a minute, then works perfect again.
This is the last log when it froze. ( I was browsing web in firefox)
Id appreciate if someone can tell me if there's something wrong there.
THANKS!!
26/10/2013 17:37:40.000 kernel[0]: memorystatus_thread: idle exiting pid 1517 [SleepServicesD]
26/10/2013 17:38:11.053 com.apple.launchd[1]: (com.apple.sleepservicesd[1521]) Exited: Killed: 9
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26/10/2013 17:38:11.448 com.apple.launchd[1]: (com.apple.cfprefsd.xpc.daemon[1520]) Exited: Killed: 9
26/10/2013 17:38:11.000 kernel[0]: memorystatus_thread: idle exiting pid 1520 [cfprefsd]
26/10/2013 17:38:11.765 com.apple.launchd.peruser.501[218]: (com.apple.cfprefsd.xpc.agent[1519]) Exited: Killed: 9
26/10/2013 17:38:11.000 kernel[0]: memorystatus_thread: idle exiting pid 1519 [cfprefsd]
26/10/2013 17:38:27.124 com.avast.proxy[170]: Error reading receive buffer: read(): Connection reset by peer
26/10/2013 17:38:27.165 com.avast.proxy[170]: Error reading receive buffer: read(): Connection reset by peer
26/10/2013 17:39:22.000 kernel[0]: disk0s2: I/O error.
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26/10/2013 17:40:03.000 kernel[0]: com.avast.AvastFileShield Error: ftype_for_vnode: vn_rdwr() failed [5]disk0s2: I/O error.
26/10/2013 17:40:03.192 locationd[1505]: Could not open database /var/folders/zz/zyxvpxvq6csfxvn_n00000sm00006d/C/lockCache_encryptedA.db, error code = 10
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26/10/2013 17:40:12.387 com.apple.launchd[1]: (com.apple.sleepservicesd[1522]) Exited: Killed: 9
26/10/2013 17:40:12.000 kernel[0]: memorystatus_thread: idle exiting pid 1522 [SleepServicesD]

Get rid of Avast. You do not need it. Check with the developer and see if there is an uninstaller.
This may be your problem.
Ciao.

Lion OS random freezing. Any updates on a fix for this?

I've downloaded the latest Lion OS updates but my iMac continues to randomly freeze up and requires a restart. Any updates on a fix for this?

Create a new admin user account, log into it, and see if the freezes persist.

Random freezing on a Macbook Air?

Hello,
I am encountering random freezing on my Macbook Air, that has started in the last few weeks.
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I am wondering if either my RAM or CPU is defective? Or is this something software?
It is a 2010 Macbook Air 11.6", a little more than a year old.   What are my recourse that would result in minimum wasted time:
Sometimes it goes for an hour with no problems (I can even run 3D) and might not be able to demonstrate in front of Apple.
Unfortunately, I did not have the foresight to get AppleCare, so I'll have to expend some time and/or money.
What is least painful?
I first backup my personal files (mostly done, as it's mostly on various cloud services)
1. Assume it's software: Attempt to reinstall OSX, cross fingers it doesn't happen again?    Run a few overnight 3D benchmark tests to 'burn it in' and verify it is not a hardware problem?
2. or Purchase a new Macbook Air & then bring the old Air in, then resell the Air after it's repaired? (Minimum downtime method, high cost method)
3. or Apple Store & try to get it repaired/serviced.   (Lower cost method)
4. or trade it in for a discounted refurbished 2011 Air?   (If the Apple Store does this sort of stuff)
Thanks,
Mark Rejhon

I am able to drag photos from iPhoto to Contacts on my MacBook Air. I resize the iPhoto window to make it smaller, open Contacts, select the Contact in question and click the Edit button at the lower right of the contact. I then drag the photo from iPhoto.
The step that I'm guessing that you might be missing is clicking the Edit button at the lower right of the contact.

Brand new 2011 MacBook Pro Randomly freezing

Hi,
Im a bit concerned I have just got a BRAND NEW MacBook Pro 2011 and already I have had 4-5 random freezes where i have had to hold down the power button to bring it back to life!!
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I'm a bit dissapointed as I have just switched from windows PC's because I had had enough of that sort of thing and believed these where solid machines with very little issues comapred to a windows system!! and for 2k I don't exect it to freeze especially within a week!!
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Hello, I have had very similar problems but with the MBP not even registering that a charger is plugged in (no light coming on and no change to the battery symbol).
I had a mid 2010 model that was sent in 4 times to be fixed, with no change, followed by the unit being replaced altogether with the latest 2011 model, only to find the issue persists (the charger was replaced early on as well).
The only retaining factor is the Lion software which forums have highlighted has effected charging when individuals have upgraded.
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Appalled and ultimately very disappointed.

I get random freezes and have to force shut down

My iMac woked fine before OS X Lion, But now it randomly freezes up and I have to hold down the power button. I have tried just letting the Mac stay freezed, but I still have to force shut down. Please help he resove my problem.

Try some of the fixes in Understanding upgrade nightmares*. I'd be particularly inclined to blame third-party software, but obviously can't be sure that's the correct diagnosis so quickly!
* Disclaimer: links to my pages may give me compensation, and should not be taken as endorsement of my services by Apple.

Mid 2009 13.3" Macbook Pro random freezing issue

Hi all,
I had a 2009 13.3" Unibody Macbook and last week purchased a 13.3" Macbook Pro. I had installed 4GB of RAM in the MB myself, and it had worked fine for the month I owned it.
I backed up my MB with an external USB hard drive using Time machine, restored from this backup on my MBP and moved the 4GB RAM over.
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I have an update!
I made an appointment with a local Apple Genius Bar and talked to a technian. He said it was neither the RAM nor the Hard Drive at fault.
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Problem solved!
Edit:
In reply to some questions posted by other members (thank you by the way).
I did install EFI 1.7 update. I did not use the Migration assistance. At some point I will do a fresh install then pick and choose parts from a backup rather than using a full Time Machine Restore. This could still have been the root cause of the issue, but it is hard to tell.
Thanks guys!
Message was edited by: mynamestom

Ipod shuffle randomly freezes....please help!!!!

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Hello, Chris.
If the problem is corrupt files, there are a couple of things you can try.
Remove the songs from the shuffle's playlist, then refill the shuffle - but don't let the offending song(s) reload; we're trying to overwrite the memory. Then you can let these songs back on. If the problem continues:
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If the songs were purchased from iTMS (and in another post I think you'd indicated they were) you can try to get them replaced or you can go the route of making an audio CD from them and reimporting the songs.
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srb

Disgusted with HP Elite m9280a constant/random freezes, lock ups, BSOD, black screen

constant/random freezes, lock ups, BSOD, black screen.
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Try this bootable memory diagnostic tool:
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HP DV9700, t9300, Nvidia 8600, 4GB, Crucial C300 128GB SSD
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Custom i7-4790k,Z-97, 16GB, Vertex 3 SSD, Plextor M.2 SSD, Samsung EVO SSD, Corsair HX650, GTX 660TI
Windows 7/8 UEFI/Legacy mode, MBR/GPT

Macbook Pro random freezing

Hi, I am experiencing random freezing of OSX, First I thought it was related to the latest flash, so I deleted it but the freezing keeps happening. Then I thought it was firefox so I switched to safari 5 but still it freezes.
Now the computer freezes randomly, some times while on the internet, some times while using mail.app, some times just sitting in the finder.
It freezes also every time I try to sync photos to my 3GS in itunes.
It also freezes after Steam is open for a while.
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If anyone has any ideas how to solve this it'll be much appreciated.

I upgraded my MBP 2009 Unibody from the original 250GB HD to a 500GB 7200rpm HD, only to experience the dreaded freezing. Freezes randomly and shows the Beachball for about 30-60 seconds. So, I put my old drive in for a while. Then later, (about3 months), I got another 500GB 7200rpm drive. Installed it, and same problem. So I put it back like it was after having to delete a bunch of stuff to get it below 250GB so I could continue to use it. Later got a 3rd 500GB 7200RPM Drive and SAME PROBLEM! So, I put a 320GB 7200RPM drive and it ALSO has the same problem.
However, each time I did this, I used Disk Utility to copy the data using the Restore command to the new drive. While connected via USB, the drives all worked great. Put them INSIDE the MBP and they give this problem randomly.
I'm really getting sick of it.
Then on August 19, a "fix" was released as a firmware update. I just found this tonight and when I ran it, I was told "This computer does not need this update." So, I guess it's only for APPLE BRANDED Drives, not my other drives. I've tried Fujitsu, Western Digital, and Hitachi drives and they all give the same problems.
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13" Macbook pro random freezing after upgrading hard drive.

i have a 2010 mbp 13" 2.4
I upgraded the hhd from the 250 to a 320 5400 RPM drive i cleared the cache did a clean install of osx 10.6 grabbed all the updates and then rolled my time machine to restore all my files.
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The AHT does test the graphics chips. Run the extended version and see if anything shows up in the form of an error code. Also, there may be a crash log in Console. Try to run something processor intensive so the Mac freezes, and then run the AHT. Heat could be a factor.
Do you have access to an Apple Store? If so, make an appointment at the Genius Bar and bring in your Mac for evaluation. They would probably have a more comprehensive hardware test they could run. If you get any error codes, bring those along.
It sounds like you could have some sort of hardware problem here. Since you are under warranty, it might be time to let Apple diagnose and fix it. It sounds like you may have had video issues during the first week of ownership with the original hard drive, and these may actually be independent of the hard drive.
Good luck!
Good luck!

MSI P35 Neo-F (MS-7360): Computer randomly freezes while playing games

Hi there,
I have reached the end of my technical knowledge right now and I'm not even sure if this area of the forum is appropriate. The problem:
While playing higher-end games like Crysis 2, Anno 1404, Mass Effect 2 etc. my computer randomly freezes and the last few milliseconds of sound are being looped on my speakers (kind of like a buzzing sound).
By "freezing" I mean that my computer becomes unresponsive to any action other than pressing the Reset-Button or holding down the Power-Up-Button (no reaction to Ctrl+Alt+Del, Alt+F4, Alt+Tab, no mouse movement... you get it).
There's no exact timing as to when these freezes occur. The fastest freeze happened after less than a minute of playing a game, slowes one (just today after switching to my newer case with better cooling) took about 2 hours.
This freeze only occurs while my System is under load. No freezes while browsing the web, using office programs, listening to music or watching videos.
System Specs:
Mainboard: MSI P35 Neo-F (MSI-7360)
CPU: Intel Core2Quad Q6600 @2.4GHz
RAM: 4x 1GB DDR2-800 Corsair XMS2
Graphics: Gainward GeForce GTX 560 Ti, 1GB GDDR5 VRAM
PSU: Antec High Current Gamer 620W (upgraded from Xilence XP600, 600W)
New CPU Cooler: Arctic Freezer 13 Pro (upgraded from OEM Intel Boxed Cooler)
New Case: Zalman Z9 Plus w/ 4x 120 mm Fans (Upgraded from a Case with only 1x 250mm side Fan)
2 Western Digital HDD (1x 2TB, 1x320 GB)
1 DVD Reader/Burner (unimportant for that error I guess)
OS: Windows 7 Ultimate 64-Bit
2 Screens: 1x 24" Asus VS248H and 1x 21" LG Flatron Wide W2240T
Since this error is bugging me for quite a while now and since this is not the first forum I'm trying to get help from, here's a list of steps i already took to get rid of it, obviously to no good use:
reinstalled games where the freeze occurred
updated all Drivers (including cleaning old versions in safe mode; also tried older drivers)
updated BIOS to v1.A0
Reinstalled Windows
bought new Case and CPU Cooler to improve Air Flow/Cooling
checked Seating of all components (took out, cleaned, reapplied thermal grease where neccessary, re-inserted)
cleaned old case of dust (obviously no problem in the new case, which is 2 days "old")
ran 7 sequences of Memtes86+ without any errors
ran Prime95 without any errors for about 45 Minutes
ran Furmark for 15 Minutes under full load (burn-in test) without any problems, even though my graphics card hit the 100°C frequency-cut level
ran Furmark and Prime95 simultaneously without any problems
took records of component temperatures and system voltages without noticing anything unusual (at least not after i switched to the newer PSU, which is about 1 Month old - yet didn't resolve the problem)
tested with cyclic removal of 1 RAM device to further rule out RAM malfunction
tested with only 2 RAM devices in dual channel mode (Slots 1 and 3)
tried to reduce RAM clock (800 MHz --> 667 MHz) to no avail
checked S.M.A.R.T. values of HDDs, no issues reported
tested without any background programs
raised/lowered voltages to RAM, CPU and Chipset in BIOS to increase logic circuit stability/decrease heat production
I need to mention: After I transferred my system to the new case, i was able to play longer than average compared to my old case. So I am guessing that improper cooling was part of the problem, yet improving cooling obviously didn't resolve it.
Since these freezes are really annoying and nobody could help me resolve this so far, I'm hoping to find some new ways of narrowing down the problem or even getting rid of it here.
Regards
Sebb

Quote from: Bernhard on 10-July-12, 13:15:30
Lets be realistic. A system with a 560TI is recommended to have a around 31Amps under full load, a CX500 would be sufficient.
Have you monitored your CPU and memory utilisation ?
As suggested before, test the GPU in another computer to see if the behaviour is the same.
Whew, I thought for a second there that my common sense had left me when I saw that 60-Amp-Post ^^
Yes, I monitored CPU and RAM usage, there is no recognizeable pattern to be seen and it almost never happens under full load.
I will see if a friend of mine can test my GPU on his computer, and I will test it underclocked right away.
Though one more question regarding that: Should I only underclock GPU Core Clock or both Core and RAM clock?

Intermittent random freezing (mid 2012 MBP)

For the past year or so my Macbook Pro (mid 2012) has suffered from random freezes which require a hard reset.
Often these will occur only roughly once a week, but in the last couple of days (incidently since updating to 10.9.3, although such bursts have occured in the past and then settled down) it has been happening 4 to 5 times a day, getting to the point of being seriously disruptive.
I have, over the past few months, made several attempts to find the cause in vain. I am an experienced Mac user with a good understanding of computers, and I've never found a problem so mysterious to me. I'll break down first the symptoms and then what I have done to tye and find the cause.
Symptoms: Normally I will first notice that web pages aren't loading, but I can switch apps without problem. However, if I try and close an app or open another, that app then starts to hang. Progressively, everything starts to hang and I can no longer even switch apps, and everything gives me a spinning beachball. Eventually, even sound/music cuts out. Only a hard reset (holding down the power key) saves it.
Diagnosis: I have run all types of hardware checks, from apple's built in tests (fsck), RAM tests such as memtest, and third party testing suites which have checked the HD, RAM, CPU, GPU etc. All of them have come back 100% clean. I have repaired permissions, which also has no effect.
This made me think it could be a software issue. However, the crashes display no discernable pattern, and are completely (as far as I can see) un-reproducible. They have occured while I have been using a wide range of apps, and don't seem to be triggered by any particular action; e.g. they can occur while I am blankly reading a webpage or a pdf document. Further, the console shows absolutely nothing. The log messages appear completely normal, sometimes there are even no messages corresponding to within several minutes of the crash.
I haven't been able to verify if it is restricted to my user name, since generally the crashes are so intermittent I would have to use another username for several days, if not weeks, to really check this - something than is not practical given that I need the laptop to work on.
Does anyone have any idea what could be causing the issue, or anything further I could try to diagnose it? I am reluctant to take it to an applestore, as it is out of warranty and I can't think of any tests they could try that I have not.

OGELTHORPE wrote:
Alastair Abbott wrote:
I am reluctant to take it to an applestore, as it is out of warranty and I can't think of any tests they could try that I have not.
An Apple store genius bar appointment and evaluation is for FREE! You have no idea what type of tests they may have, so make an appointment.
Thanks for pointing that out. Until very recently I lived in a country where there are no Apple stores nor Genius bars, so I wasn't aware of that.
I've tried safe boot, but as I said the problem is intermittent enough that it's not clear if it helps, and working continuously in safe boot to see isn't really an option.
No - there are no kernel panics, just the unexplained freezes.
Here is my etrecheck report:
Hardware Information:
          MacBook Pro (13-inch, Mid 2012)
          MacBook Pro - model: MacBookPro9,2
          1 2.5 GHz Intel Core i5 CPU: 2 cores
          6 GB RAM
Video Information:
          Intel HD Graphics 4000 - VRAM: (null)
System Software:
          OS X 10.9.3 (13D65) - Uptime: 0 days 0:26:37
Disk Information:
          TOSHIBA MK5065GSXF disk0 : (500.11 GB)
                    EFI (disk0s1) <not mounted>: 209.7 MB
                    Macintosh HD (disk0s2) / [Startup]: 499.25 GB (38.52 GB free)
                    Recovery HD (disk0s3) <not mounted>: 650 MB
          HL-DT-ST DVDRW GS31N
USB Information:
          Logitech USB Receiver
          Apple Inc. Apple Internal Keyboard / Trackpad
          Apple Computer, Inc. IR Receiver
          Apple Inc. BRCM20702 Hub
                    Apple Inc. Bluetooth USB Host Controller
          Apple Inc. FaceTime HD Camera (Built-in)
Thunderbolt Information:
          Apple Inc. thunderbolt_bus
Gatekeeper:
          Anywhere
Kernel Extensions:
          [not loaded] at.obdev.nke.LittleSnitch (3876 - SDK 10.8) Support
          [kext loaded] com.sophos.kext.sav (9.0.3 - SDK 10.7) Support
          [kext loaded] com.sophos.nke.swi (9.0.3 - SDK 10.8) Support
Launch Daemons:
          [loaded] com.adobe.fpsaud.plist Support
          [running] com.cleverfiles.cfbackd.plist Support
          [loaded] com.microsoft.office.licensing.helper.plist Support
          [loaded] com.oracle.java.Helper-Tool.plist Support
          [loaded] com.oracle.java.JavaUpdateHelper.plist Support
          [loaded] com.paragon.ntfs11.refresh.plist Support
          [running] com.sophos.autoupdate.plist Support
          [running] com.sophos.configuration.plist Support
          [running] com.sophos.intercheck.plist Support
          [running] com.sophos.notification.plist Support
          [running] com.sophos.scan.plist Support
          [running] com.sophos.sxld.plist Support
          [running] com.sophos.webd.plist Support
          [not loaded] org.freedesktop.dbus-system.plist Support
          [loaded] org.macosforge.xquartz.privileged_startx.plist Support
Launch Agents:
          [not loaded] com.adobe.AAM.Updater-1.0.plist Support
          [loaded] com.oracle.java.Java-Updater.plist Support
          [loaded] com.paragon.updater.plist Support
          [running] com.sophos.uiserver.plist Support
          [not loaded] org.freedesktop.dbus-session.plist Support
          [loaded] org.macosforge.xquartz.startx.plist Support
User Launch Agents:
          [loaded] com.adobe.ARM.[...].plist Support
          [loaded] com.adobe.ARM.[...].plist Support
          [failed] com.apple.CSConfigDotMacCert-[...]@me.com-SharedServices.Agent.plist
          [failed] com.google.Chrome.framework.plist Support
          [loaded] com.google.keystone.agent.plist Support
          [running] com.spotify.webhelper.plist Support
          [loaded] com.valvesoftware.steamclean.plist Support
          [running] ws.agile.1PasswordAgent.plist Support
User Login Items:
          iTunesHelper
          TotalTerminal
          Dropbox
          SpiderOak
          AdobeResourceSynchronizer
          Google Chrome
          EvernoteHelper
Internet Plug-ins:
          SpeedDownload Browser Plugin: Version: 2.1.5 - SDK 10.6 Support
          Unity Web Player: Version: UnityPlayer version 4.2.1f4 - SDK 10.6 Support
          Default Browser: Version: 537 - SDK 10.9
          Flip4Mac WMV Plugin: Version: 3.2.0.16   - SDK 10.8 Support
          AdobeAAMDetect: Version: AdobeAAMDetect 1.0.0.0 - SDK 10.6 Support
          FlashPlayer-10.6: Version: 13.0.0.214 - SDK 10.6 Support
          Silverlight: Version: 5.1.20913.0 - SDK 10.6 Support
          Flash Player: Version: 13.0.0.214 - SDK 10.6 Support
          QuickTime Plugin: Version: 7.7.3
          Mathematica: Version: 9.0.1.4055068 Support
          SharePointBrowserPlugin: Version: 14.4.1 - SDK 10.6 Support
          JavaAppletPlugin: Version: Java 7 Update 55 Check version
Safari Extensions:
          Omnikey: Version: 1.0.9
          Searchme: Version: 1.3
          1Password: Version: 4.1.0
          AdBlock: Version: 2.6.18
Audio Plug-ins:
          BluetoothAudioPlugIn: Version: 1.0 - SDK 10.9
          AirPlay: Version: 2.0 - SDK 10.9
          AppleAVBAudio: Version: 203.2 - SDK 10.9
          iSightAudio: Version: 7.7.3 - SDK 10.9
iTunes Plug-ins:
          Quartz Composer Visualizer: Version: 1.4 - SDK 10.9
User Internet Plug-ins:
          RealPlayer Plugin: Version: Unknown
3rd Party Preference Panes:
          Flash Player Support
          Flip4Mac WMV Support
          FUSE for OS X (OSXFUSE) Support
          Java Support
          Perian Support
          TeXDistPrefPane Support
Time Machine:
          Skip System Files: NO
          Auto backup: YES
          Volumes being backed up:
                    Macintosh HD: Disk size: 464.96 GB Disk used: 429.09 GB
          Destinations:
                    Macbook Backup [Local] (Last used)
                    Total size: 465.14 GB
                    Total number of backups: 23
                    Oldest backup: 2013-05-12 21:27:14 +0000
                    Last backup: 2014-05-17 11:23:10 +0000
                    Size of backup disk: Too small
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Macbook Air 2011 11" - random freezes. Roaming wifi causing it?

I have MacBook Air 11" Mid-2011 (4GB RAM, 128GB SSD, i5). Ever since getting the machine I've experienced random freezes - spinning beachball, screen becomes unresponsive, holding the power button to force it to close being the only thing I can do. The console logs don't show anything that indicates a problem. They just stop logging anything until I restart. I took it to an Apple store Genius while still under warranty and they kept it in for a few days and ran a suite of tests and found nothing.
The problem was completely random and unreproducable. Sometimes it would happen a few times in a row, then nothing for weeks. Also, it was only happening when I was staying in a particular hotel during the week for work. It was Hilton hotel with the wifi being provided by BT Openzone. It would only happen there, never at home, family members house, Starbucks (which also use BT Openzone here in the UK, airports).
I recently made some changes to my home wifi setup and the problem has reappeared, but this time at home. Where previously I just had an Airport Extreme, I have now extended the network over ethernet powerline to a second wifi access point. The second wifi access point has the same SSID as the main network.
All my wireless devices should seamlessly switch between access points as I move them around the house. Our iPhones, iPads and Dell laptop seem to have no problem doing this. When I move away from one access point, once the signal strength drops to certain point, the device connects to the second access point. The MacBook Air also does this, but it seems to freeze if I am in an area where the signals are overlapping. This also describes the situation in the hotel. The BT Openzone hotspots were spread across the hotel. If my room was in an area where the signals from access points were overlapping I would be more likely to experience the freeze.
If I look in the Wifi logs I can see messages stating that some sort of threshold has been reached and the wifi is starting roaming. These messages are always present at the time of the freezes.
Has anyone else experienced this problem? Is it something Apple would fix eventhough I'm now out of warranty? If it could be a hardware problem, would replacing the wifi card myself help?
cheers.

I have MacBook Air 11" Mid-2011 (4GB RAM, 128GB SSD, i5). Ever since getting the machine I've experienced random freezes - spinning beachball, screen becomes unresponsive, holding the power button to force it to close being the only thing I can do. The console logs don't show anything that indicates a problem. They just stop logging anything until I restart. I took it to an Apple store Genius while still under warranty and they kept it in for a few days and ran a suite of tests and found nothing.
The problem was completely random and unreproducable. Sometimes it would happen a few times in a row, then nothing for weeks. Also, it was only happening when I was staying in a particular hotel during the week for work. It was Hilton hotel with the wifi being provided by BT Openzone. It would only happen there, never at home, family members house, Starbucks (which also use BT Openzone here in the UK, airports).
I recently made some changes to my home wifi setup and the problem has reappeared, but this time at home. Where previously I just had an Airport Extreme, I have now extended the network over ethernet powerline to a second wifi access point. The second wifi access point has the same SSID as the main network.
All my wireless devices should seamlessly switch between access points as I move them around the house. Our iPhones, iPads and Dell laptop seem to have no problem doing this. When I move away from one access point, once the signal strength drops to certain point, the device connects to the second access point. The MacBook Air also does this, but it seems to freeze if I am in an area where the signals are overlapping. This also describes the situation in the hotel. The BT Openzone hotspots were spread across the hotel. If my room was in an area where the signals from access points were overlapping I would be more likely to experience the freeze.
If I look in the Wifi logs I can see messages stating that some sort of threshold has been reached and the wifi is starting roaming. These messages are always present at the time of the freezes.
Has anyone else experienced this problem? Is it something Apple would fix eventhough I'm now out of warranty? If it could be a hardware problem, would replacing the wifi card myself help?
cheers.

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