Macbook keeps on freezing whole laptop just stops

My mac has been doing this for about 1 and half weeks now i don't know why it's happening, i'm just useing it like i always do like checking emails, editing videos, looking at the web and then it just stops the only thing i can do is move the mouse, even the time stops on it? Anyone have any ideas?

Yes it is true Apple do recommend the update. They also give a step by step guide that must be followed. They also offer a CD restore if all goes wrong. I don't work for Apple, I am just spending my precious time trying to help put someone on the right course.
If you don't want to try what I recommend please take your machine back to Apple. I am sure they will sort it out for you.

Similar Messages

  • My macbook keeps on freezing

    Hi, I have a MacBook7, 1, and it keeps freezing.
    Mac Info:
    - Version 10.6.8
    - Processor 2.4 GHz Intel Core 2 Duo
    - Memory 2 GB 1067 MHz DDR3
    - Startup Disk Macintosh HD
    The first time it froze, I had been using it for about 2 hours, and I was watching a TV episode online when all of a sudden it just stopped. I had to force shutdown and restart. Half an hour in the same thing happened, and then the time I had before it froze got shorter and shorter until it was about 10 seconds. By the end I didn't even have any applications open before it froze and I did havie it plugged in.
    When it freezes, there is no grey screen or beach ball mouse, it just stops. The fans go on full blast and if I'm playing a song on iTunes it keeps replaying the last 1/2 a second of the song like a broken record.
    Sometimes when I restart it takes a few 5 second holds of the power button to get it going, but usually it eventually does. Recently though I was starting it up and where the apple should have been a circle with a diagonal line appeared, like a no access sign or something. I had to then shut it down and restart again. This has only happened once.
    I've been having this problem for a while now, it got so annoying that I gave up, put it away and didn't use it for 2 years. I've decided to bring it out give it another shot but it eventually froze, and the period before the freeze kept getting shorter and shorter, until now it barley lasts 10 seconds.
    The first time this occurred I had it examined at a Mac store, it cost a couple of hundred dollars and they couldn't find anything wrong. I've been tempted to get it examined at a new one, but I don't know if I want to waste that much money again.
    If anyone has any idea what's going on or how to possibly fix it, I would greatly appreciate it,
    Thanks.

    Since you've got a valid backup (always important), the first thing I'd do is boot to the diagnostics from the original installation DVD. Run diags, full if possible, but short if not. This will, hopefully, give you information about pending hardware failures. In some cases, there have been faulty video chips that have caused systems to fail in the fashion you describe. Apple has often replaced the logic boards on these systems, even out of warranty.
    If there is a HDD failure in progress, diags will likely find that and enable you to replace the ailing hard disk. You can use your installation DVD to restore your complete system from a Time Machine backup or migrate your user ID into a fresh install.
    If the diagnostics do not indicate any failures, you should:
    Reset your NVRAM (http://support.apple.com/kb/ht1379);
    Reset your SMC (http://support.apple.com/kb/ht3964);
    Boot to Safe Mode (http://support.apple.com/kb/ht1564).
    Optionally, but not a bad idea by any means, is to boot to the installation DVD and use Disk Utility to repair the disk and repair the file permissions.
    With luck, the NVRAM and SMC resets will get the system singing happily. If not, let us know and we'll carry on from there.
    Message was edited by Trane Francks to fix wonky links and bad grammar.

  • My macbook keeps on freezing with black screen

    My Macbookpro keeps on freezing. Suddenly the screen goes black and it does not respond to any command.

    It could be one of many problems, including a failing Graphics Card/RAM/HDD (I suspect the first one)
    What you need to do is to perform a full Apple Hardware Test and post the results here.
    On your computer, the AHT program is on the second DVD that came with your machine.
    Refer to this page to help you do this test...
    http://support.apple.com/kb/ht1509
    Using Apple Hardware Test
    Apple Hardware Test (AHT) contains a suite of diagnostics that will test the hardware of your computer. It's a great way to rule out a hardware issue when troubleshooting your computer.
    Using Apple Hardware Test on computers with OS X 10.5.5 to 10.6.7
    AHT is located on the Applications Install Disc 2 and should be included with your computer or the MacBook Air Software Reinstall Drive on a MacBook Air (Late 2010). To start AHT on these computers make sure the Applications Install Disc 2 is inserted into the built-in optical drive, external Apple Superdrive, or for the MacBook Air (Late 2010) be sure the MacBook Air Software Reinstall Drive is inserted into a USB port. Please then follow steps 1-6 outlined in the "Using Apple Hardware Test on computers with OS X 10.7 or later" section of this article.

  • App keeps bouncing in dock, then just stops. Doesn't open.

    So I had Rapidweaver working fine earlier today, then I installed some plugins and tried opening the software again - then it just kept bouncing in the dock, didn't open...
    Tried reinstalling, and looked to remove every trace of the program - but when I had uninstalled it, there was nothing left in the application support folder for me to remove..
    Any suggestions?

    Console says this:
    09/11/14 16:15:08,382 TOCGenerator[2164]: WARNING: The Gestalt selector gestaltSystemVersion is returning 10.9.0 instead of 10.10.0. Use NSProcessInfo's operatingSystemVersion property to get correct system version number.
    Call location:
    09/11/14 16:15:08,382 TOCGenerator[2164]: 0   CarbonCore                          0x913197e7 ___Gestalt_SystemVersion_block_invoke + 135
    09/11/14 16:15:08,382 TOCGenerator[2164]: 1   libdispatch.dylib                   0x9087d130 _dispatch_client_callout + 50
    09/11/14 16:15:08,382 TOCGenerator[2164]: 2   libdispatch.dylib                   0x9087d0b5 dispatch_once_f + 251
    09/11/14 16:15:08,382 TOCGenerator[2164]: 3   libdispatch.dylib                   0x9087e0d8 dispatch_once + 31
    09/11/14 16:15:08,383 TOCGenerator[2164]: 4   CarbonCore                          0x912abfb8 _Gestalt_SystemVersion + 1050
    09/11/14 16:15:08,383 TOCGenerator[2164]: 5   CarbonCore                          0x912abb69 Gestalt + 150
    09/11/14 16:15:08,383 TOCGenerator[2164]: 6   TOCGenerator                        0x000023da -[AppDelegate applicationDidFinishLaunching:] + 28

  • My macbook keeps turning off and freezing on start up

    So like my macbook keeps either freezing on start up or it will just shut off or restart itself
    When it restarts itself it will bring up the main screen then this box comes up telling me to hold down the power button and restart it
    A friend said it might have something to do with the fan not working or it overheating
    But I can have it off all night then turn it on in the morning and it will mess up
    It will do it sometimes between 2-4 times
    I don't know what is making it does this
    I ran the check up things and it said that nothing was wrong?

    This sounds like the same thing that has been happening to both my Macbook and Macbook Pro. Some others sound like they have similar problems. This is what I posted in the Macbook Pro area regarding the same symptoms. This is discouraging. These computers are expensive and they should have the bugs worked out better than this.
    From: Massachusetts
    Registered: Mar 5, 2006
    Re: Brand New MacBook Pro 2.33GHz dies
    Posted: Nov 16, 2006 3:52 PM in response to: Newton
    Reply Email
    I wonder if I have similar problems. I have both a Macbook Pro 15" and a Macbook 13"
    1st my macbook started shutting itself off unexpectedly. It got more and more frequent. I have done several fixes including: archive and install, sending it in to have a logic board replaced, downloading an updated disc utility repair, and sending it in to have a power component replaced. Now I will be sending it in for a third time and I think they will replace the Macbook machine if this repair doesn't work.
    Now my Macbook Pro is doing the same thing. I have had it for about 6 months and it was running fine until now. I ran the exact same software on my 12 G-4 powerbook without any problems. One of the computer people at work said it sounds like a power problem. It happens whether it is running AC or on battery power and doesnt seem to matter what I am doing.
    I am waiting for the macbook to be fixed before I address the Macbook Pro because I dont want to have both of my computers in the shop at the same time.
    Any suggestions? This seems totally unacceptable for two new expensive computers.

  • Macbook air completely freezes

    For more than 2 years, I have had a problem with my MacBook Air totally freezing.  The clock stops advancing, mouse won't move, and the only way out is to hold the power button down for a full shutdown.  This problem has persisted through several updates of the OS.  Sometimes it happens even when no programs are running, and the computer is just sitting.  It does seem to happen more often when I am running Parallels Desktop, but other than that, there is nothing consistent I have been able to discern in what causes this to happen. 
    Does anyone have a clue what is causing this or how to cure it?

    Hi there. I'm not using any 3rd party screen saver software, only the standard Mountain Lion supplied stuff.
    I did have to get the Genuis Guys to reset my SMC as my battery, fan & power lead were showing problems.  Those issues are now solved but this has persisted.
    I am considering a reinstal of the OS system but that is a 1 hour download following by ?? hours of waiting for the program to restart.
    I'll try using one of the other screen saver options to test that.
    Thanks for that idea.

  • Everything just STOPS

    Unibody Macbook Pro June 2009 edition
    13.3'' OSX snow leopard 10.6.2
    2.26Ghx intel core 2 duo 4GB DDR3
    Basically, every couple hours or so, my whole computer just stops responding.
    First symptoms are: my internet stops working(still responding) then, as i try to force quit, program dose not respond, nor does it close. All programs not responding. I even try to reboot finder, no luck. I try to restart or shut down computer, dosent work. This is all accompanied by the SBBOD.
    only way to fix this is to manually restart, holding the power button...
    ive had this problem for about 2 months now, and have run Virus barrier X5 several times, no viruses.
    i have even run disk utility to repair and fix disk and permissions, that helped a bit, then it just came back
    help?

    Note the exact time the issue happens and check your System logs in your Console application for clues to the cause.
    Also, have your Activity Monitor running and monitor your CPU usage. See what it's doing when it starts to slow down. TIP: If you double-click on the CPU monitor window in the Activity Monitor, you will get a floating window that you can resize. I put mine down in the bottom left hand corner of my screen--like pictured below. It's like monitoring RPMs in a car.
    One more thing; you might try uninstalling that Virus software. It can cause problems if it's running in the background. No need to have that on a Mac. If you get a virus, I will eat it.
    Dave M.
    MacOSG Founder/Ambassador  An Apple User Group  iTunes: MacOSG

  • *****My Clickwheel Keeps On Freezing*****

    How do I articulate this? When I enter a menu fresh, the clickwheel works fine. Let's hypothesise that I've just selected a track, 'Weak Become Heroes' by The Streets. The volume at the start of the song is a bit loud so I give the wheel a wee flick and lower it. All is fine. After a window of 10 seconds or so the clickwheel suddenly freezes. It just stops working. I can't alter the volume anymore. However, if I 'refresh the page' (ie. press the Menu button to back out of the current 'page' and then push Select to re-enter it), it suddenly works again fine. For 10 seconds or so. And then it freezes again and I have to do another 'refresh'. And it goes on like this.
    I've put up with this for 9 months now (I've been out of warranty). Why does this happen? Is it a fault with the machine or the last firmware update Apple released? This never used to happen in the first year that I owned the iPod mini. What can I do to fix the problem, bar sending it in for a costly (and pointless repair)?

    By doing a Restore = erase your iPod and refomat it. Of course install the software back to your iPod. You should able to find the iPod updater in your PC (one of the programe). Open it and plug your iPod with your computer only when you be asked to do so. and click Restore. I have a mini suffered from the same problem and ended up with a replacement.

  • Airport just stopped working

    Hi Everyone,
    I hopw someone has some info that might help.
    I have a MacBook and PC (yuck). Both just stopped working with my Airport Extreme, and when I tried plugging the ethernet cable directly into both, nothing happened. No data was transferring.
    I called my cable company and they were able to get my PC working, directly connected, but not the MacBook.
    When the ethernet cable is plugged directly into the MacBook, nothing happens...no lights showing it's connected to the computer. When I connect the ethernet cable to the Airport, everything lights up, showing a connection, but I can't get the data to transfer from Airport to MacBook (or PC for that matter).
    Right now, I'm hijacking someone else's wireless signal in my condo...don't really know who. So, I know my Airport card is working properly.
    The tech at Brighthouse cable saod something about earthlink customers having trouble recently because of something that earthlink downloaded to them, where IP addresses wouldn't renew. I never downloaded anything, is this possible?
    I'm really stumped, and frustrated because I can't connect, and it's not feasible for me to hardwire in due to the location of my cable modem. Plus, that only works with the crappy PC, and I don't want to use that.
    Please, someone help...I'm desperate...and at a loss for what the problem could be!
    Thank you!!!!
    EDIT: I just powered up my old iBook G4, and it won't connect to my base station either
    EDIT X2: I should probably add what I have already tried...I have (several times) unplugged the cable modem and Airport base station. Used Airport set up to re-set it (again, several times).

    Ok MCOJerry,
    Here's the scoop.
    My friend called and gave me the story much like you described. Almost identical in fact.
    He had called TimeWarner, who didn't come to any resolution and then referred him to Earthlink, washing their hands in the process.
    A over seas tech support then spend a couple of hours, then made a call back with another tech. who also spent significant time on the phone. This time the tech reconfigured OSX a couple of times. Set up alternate location profiles, changed the DNS settings etc.
    They re-assigned the IP address and forced the cable modem to init. the MAC address list. They also disconnected the Airport Extreme (the square version) connected the mac directly to the modem and forced a manual set of IP settings.
    They got the mac to work with this last configuration, but of course the rest of the machines were out of luck as was the network printer.
    All in all he spent six hours on the phone.
    When I got 'the call' I had him give me some preliminary network stats and then had him reconnect the Airport Extreme. This yielded a dead internet connection.
    So as I wrote earlier, I went over there armed with a boat load of tools & cables.
    I reconfigured the mac to a normal & stable automatic type configuration. I also reset the the Airport buy pressing the reset button for 5sec. Then set up a new configuration. I made sure that the latest update was applied to the Airport extreme.
    Then I logged on to the cable modem. Don't mis-understand, I did not log on to the internet through the modem. I logged on to the modem's internal web server. checked some logs and ran a couple of tests.
    Then I found the problem. The real problem: The signal power level from the point of demarcation (at the pole) was so low as to be useless. Eliminating the Airport Extreme, simply removed a level of complication in the system. It also may have removed some spurious RF that may have been introduced into the network. It did not result in a resolution to the real problem.
    The cable line needs to be physically repaired. Either a wet connection or a frayed shield or the line needs a booster. But the problem, which looked like a Airport extreme issue is in fact a bad cable line.
    I do have him up and running on the Airport Extreme at this moment by eliminating all extraneous length from his cable line within the house. The cable modem is now located in the basement where the cable enters the house. I have an single ethernet cable running from there to the Airport Extreme. I pulled all the other electrical items from this particular power line branch (This specific circuit.) This is all temporary until the cable guy/gal arrives to fix the problem.
    I hope this may help you in your trouble resolution.
    -Alan
    Specs:
    Motorola SB 5100 Cable Modem.
    minus (-)5db signal power level
    Software Version: SB5100-2.3.2.5-SCM01-NOSH
    Hardware Version: 3
    MIB Version: II
    GUI Version: 1.0
    VxWorks Version: 5.4
    OSX 10.4.9
    Airport Utility 5.1 (510.18)
    Airport Extreme Base Station (square model) V7.1
    Open DNS
    208.67.222.222
    208.67.220.220
    AlBook, TiBook, iMac, iBook   Mac OS X (10.4.9)   Corporate / mixed environment / multiple networks.

  • When I started up my macbook Pro after a boat trip (just lying in my bag the whole time) it started making weird sounds. Why does it do that and how do I stop it?

    When I started up my macbook Pro after a boat trip (just lying in my bag the whole time) it started making weird sounds. Why does it do that and how do I stop it?

    The 13" retina MBP has two fans, left and right near the hinge and about 2.5" each from the edges of the case.
    My conjecture is that one of the fans may be failing.  An appointment at an Apple store genius bar is the best option.  The evaluation will be FREE and a fan replacement (if that is the problem) should not break the bank account.
    You might run an Apple Hardware Test:
    http://support.apple.com/kb/PH11342
    This may confirm my suspicion or perhaps find a different problem. Note that an error free result should not be viewed as being definitive.
    Ciao.

  • How do I stop my whole laptop freezing when I use Firefox to visit a site that uses Java aplets?

    For the last few weeks, whenever I've used Firefox to visit a trusted site that uses Java aplets, I've got a warning advising me to update Java. But when I check Java, it tells me I already have the most up to date version. However, as of today, whenever I visit the same trusted site my whole laptop freezes - cursor disappears, everything stops. I can't even use Restart - I have to manually disconnect the power. The same happens when I attempt to access Java via the Control Panel (to uninstall) - the moment the cursor hovers over Java, everything freezes and I have to disconnect power. I'm using Vista Home Premium SP2 32-bit. HELP!!

    Potentially unsafe versions of the Java plugin are "Click to Play" blocked, meaning that you have to click to activate Java for each site. See the [[How to enable Java if it's been blocked]] article for more information.
    '''Note:''' To make sure that your Java plugin is working, you can visit the test pages listed in the article, [[Use the Java plugin to view interactive content on websites]]. If an "Activate Java" message box appears, click inside the box to activate the Java plugin.
    When you see the "Activate Java" message box, simply click it to load the Java content normally.
    <br><br>
    [[Image:Fx24-JavaActivate]]
    If there is no visible area to activate Java content in the page, click the red plugin icon in the address bar. In the message panel that opens, choose "Allow Now" to enable Java content temporarily.
    <br><br>
    [[Image:Fx24-JavaAllowNow]]
    <br><br>
    The next time you visit the site or any other that uses Java you will see this message again.
    If you want to always activate Java for a particular site, you can use the "Allow and Remember" option shown above.
    After activating Java, you may also see a "Security Warning" dialog box, asking you to confirm that you want to run Java. This warning comes from Java itself, not from Firefox.
    <b>NOTE: </b> After following the above steps, your computer may freeze for around one minute while the Java program is loaded.
    Does this solve your problem? Please report back soon.

  • Hello, my iphone 4 has just stopped working it has gone blank..i plugged it into my laptop and it the apple sign keeps flashing it wont connect to itunes either :/ HELP!!!

    hello, my iphone 4 has just stopped working it has gone blank..i plugged it into my laptop and it the apple sign keeps flashing it wont connect to itunes either :/ HELP!!!

    Try the following:
    1. Reset
    Hold the Sleep and Home button down until you see the Apple logo
    2. Restore:
    http://support.apple.com/kb/HT1414
    3. Recovery:
    http://support.apple.com/kb/HT1808

  • Can anybody help? My Safari browser keeps crashing. The whole window just turns grey.

    Can anybody help? My Safari browser keeps crashing on iMac 10.7.5. The whole window just turns grey. It started happening around the time of the new bookmarks menu upgrade recently which changed the bookmarks to be only on the side and makes it so you can see all your bookmarks while browsing.  I know I have a lot of bookmarks, so I tried hiding them, but it still happens. I ALREADY TRIED CLEARING MY HISTORY, AND THAT DID NOT HELP, AND I HAVE NO EXTENSIONS FOR THIS BROWSER.
    Does the fact that I am in Brasil have anything to do with it?
    Thank you to anyone who can help. In case no one can come up with an answer, is there an easy way to transfer my bookmarks from safari to either firefox or chrome?
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    1. This is a comment on what you should and should not do to protect yourself from malicious software ("malware") that circulates on the Internet. It does not apply to software, such as keystroke loggers, that may be installed deliberately by an intruder who has hands-on access to the victim's computer. That threat is in a different category, and there's no easy way to defend against it. If you have reason to suspect that you're the target of such an attack, you need expert help.
    If you find this comment too long or too technical, read only sections 5, 6, and 10.
    OS X now implements three layers of built-in protection specifically against malware, not counting runtime protections such as execute disable, sandboxing, system library randomization, and address space layout randomization that may also guard against other kinds of exploits.
    2. All versions of OS X since 10.6.7 have been able to detect known Mac malware in downloaded files, and to block insecure web plugins. This feature is transparent to the user, but internally Apple calls it "XProtect." The malware recognition database is automatically checked for updates once a day; however, you shouldn't rely on it, because the attackers are always at least a day ahead of the defenders.
    The following caveats apply to XProtect:
    It can be bypassed by some third-party networking software, such as BitTorrent clients and Java applets.
    It only applies to software downloaded from the network. Software installed from a CD or other media is not checked.
    As new versions of OS X are released, it's not clear whether Apple will indefinitely continue to maintain the XProtect database of older versions such as 10.6. The security of obsolete system versions may eventually be degraded. Security updates to the code of obsolete systems will stop being released at some point, and that may leave them open to other kinds of attack besides malware.
       3. Starting with OS X 10.7.5, there has been a second layer of built-in malware protection, designated "Gatekeeper" by Apple. By default, applications and Installer packages downloaded from the network will only run if they're digitally signed by a developer with a certificate issued by Apple. Software certified in this way hasn't necessarily been tested by Apple, but you can be reasonably sure that it hasn't been modified by anyone other than the developer. His identity is known to Apple, so he could be held legally responsible if he distributed malware. That may not mean much if the developer lives in a country with a weak legal system (see below.)
    Gatekeeper doesn't depend on a database of known malware. It has, however, the same limitations as XProtect, and in addition the following:
    It can easily be disabled or overridden by the user.
    A malware attacker could get control of a code-signing certificate under false pretenses, or could simply ignore the consequences of distributing codesigned malware.
    An App Store developer could find a way to bypass Apple's oversight, or the oversight could fail due to human error.
    For the reasons given above, App Store products, and other applications recognized by Gatekeeper as signed, are safer than others, but they can't be considered absolutely safe. "Sandboxed" applications may prompt for access to private data, such as your contacts, or for access to the network. Think before granting that access. OS X security is based on user input. Never click through any request for authorization without thinking.
    4. Starting with OS X 10.8.3, a third layer of protection has been added: a "Malware Removal Tool" (MRT). MRT runs automatically in the background when you update the OS. It checks for, and removes, malware that may have evaded the other protections via a Java exploit (see below.) MRT also runs when you install or update the Apple-supplied Java runtime (but not the Oracle runtime.) Like XProtect, MRT is effective against known threats, but not against unknown ones. It notifies you if it finds malware, but otherwise there's no user interface to MRT.
    5. The built-in security features of OS X reduce the risk of malware attack, but they're not absolute protection. The first and best line of defense is always going to be your own intelligence. With the possible exception of Java exploits, all known malware circulating on the Internet that affects a fully-updated installation of OS X 10.6 or later takes the form of so-called "Trojan horses," which can only have an effect if the victim is duped into running them. The threat therefore amounts to a battle of wits between you and the malware attacker. If you're smarter than he thinks you are, you'll win.
    That means, in practice, that you always stay within a safe harbor of computing practices. How do you know what is safe?
    Any website that prompts you to install a “codec,” “plug-in,” "player," "extractor," or “certificate” that comes from that same site, or an unknown one, is unsafe.
    A web operator who tells you that you have a “virus,” or that anything else is wrong with your computer, or that you have won a prize in a contest you never entered, is trying to commit a crime with you as the victim. (Some reputable websites did legitimately warn visitors who were infected with the "DNSChanger" malware. That exception to this rule no longer applies.)
    Pirated copies or "cracks" of commercial software, no matter where they come from, are unsafe.
    Software of any kind downloaded from a BitTorrent or from a Usenet binary newsgroup is unsafe.
    Software that purports to help you do something that's illegal or that infringes copyright, such as saving streamed audio or video for reuse without permission, is unsafe. All YouTube "downloaders" are outside the safe harbor, though not all are necessarily harmful.
    Software with a corporate brand, such as Adobe Flash Player, must be downloaded directly from the developer’s website. If it comes from any other source, it's unsafe. For instance, if a web page warns you that Flash is out of date, do not follow an offered link to an update. Go to the Adobe website to download it, if you need it at all.
    Even signed applications, no matter what the source, should not be trusted if they do something unexpected, such as asking for permission to access your contacts, your location, or the Internet for no obvious reason.
    "FREE WI-FI !!!" networks in public places are unsafe unless you can verify that the network is not a trap (which you probably can't.) Even then, do not download any software or transmit any private information while connected to such a network, regardless of where it seems to come from or go to.
    6. Java on the Web (not to be confused with JavaScript, to which it's not related, despite the similarity of the names) is a weak point in the security of any system. Java is, among other things, a platform for running complex applications in a web page, on the client. That was always a bad idea, and Java's developers have proven themselves incapable of implementing it without also creating a portal for malware to enter. Past Java exploits are the closest thing there has ever been to a Windows-style virus affecting OS X. Merely loading a page with malicious Java content could be harmful.
    Fortunately, client-side Java on the Web is obsolete and mostly extinct. Only a few outmoded sites still use it. Try to hasten the process of extinction by avoiding those sites, if you have a choice. Forget about playing games or other non-essential uses of Java.
    Java is not included in OS X 10.7 and later. Discrete Java installers are distributed by Apple and by Oracle (the developer of Java.) Don't use either one unless you need it. Most people don't. If Java is installed, disable it — not JavaScript — in your browsers.
    Regardless of version, experience has shown that Java on the Web can't be trusted. If you must use a Java applet for a task on a specific site, enable Java only for that site in Safari. Never enable Java for a public website that carries third-party advertising. Use it only on well-known, login-protected, secure websites without ads. In Safari 6 or later, you'll see a lock icon in the address bar with the abbreviation "https" when visiting a secure site.
    Follow the above guidelines, and you’ll be as safe from malware as you can practically be. The rest of this comment concerns what you should not do to protect yourself from malware.
    7. Never install any commercial "anti-virus" or "Internet security" products for the Mac, as they all do more harm than good, if they do any good at all. Any database of known threats is always going to be out of date. Most of the danger is from unknown threats. If you need to be able to detect Windows malware in your files, use one of the free anti-virus products in the Mac App Store — nothing else.
    Why shouldn't you use commercial "anti-virus" products?
    Their design is predicated on the nonexistent threat that malware may be injected at any time, anywhere in the file system. Malware is downloaded from the network; it doesn't materialize from nowhere.
    In order to meet that nonexistent threat, the software modifies or duplicates low-level functions of the operating system, which is a waste of resources and a common cause of instability, bugs, and poor performance.
    To recognize malware, the software depends on a database of known threats, which is always at least a day out of date. Most of the real-world danger of malware attack comes from highly targeted "zero-day" exploits that are not yet recognized.
    By modifying the operating system, the software itself may create weaknesses that could be exploited by malware attackers.
    8. An anti-malware product from the App Store, such as "ClamXav," doesn't have these drawbacks. That doesn't mean it's entirely safe. It may report email messages that have "phishing" links in the body, or Windows malware in attachments, as infected files, and offer to delete or move them. Doing so will corrupt the Mail database. The messages should be deleted from within the Mail application.
    An anti-virus app is not needed, and should not be relied upon, for protection against OS X malware. It's useful only for detecting Windows malware. Windows malware can't harm you directly (unless, of course, you use Windows.) Just don't pass it on to anyone else.
    A Windows malware attachment in email is usually easy to recognize. The file name will often be targeted at people who aren't very bright; for example:
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