Antivirus on Leopard

I have a new copy of norton antivirus and a Leopard osx 10.5 installed with win xp on boot camp:
have I to install norton antivirus on leopard or on windows xp?
does the immunity of mac protect win xp, too?

markstm wrote:
I have a new copy of norton antivirus and a Leopard osx 10.5 installed with win xp on boot camp:
Have I to install norton antivirus on leopard or on windows xp?
Does the immunity of mac protect win xp, too?
No, there is no immunity of mac but because the File system is different Mac OS X has HFS & XP uses Fat 32 or NTFS. It is very hard to get your Mac sick from your Boot Camp Partition/Drive more so if you use NTFS. I would not use ClamXav on Leopard or any OS X it has a flaw http://www.frsirt.com/english/advisories/2006/1807
I would use in this order Internet Security Barrier X5 that has Intego VirusBarrier X5 10.5.3 with in it, Norton 11 for Mac, ProtectMac AntiVirus 0.9.3 & then iAntiVirus Free Edition, the reason I put iAntiVirus is it is the only Mac Only Antivirus softwhere I listed but it is fast & free. If you have not opened Norton buy Intego VirusBarrier X5 it is way faster & now comes with BitDefender AV a much better AV then Norton (PC Answers editor's choice award in a comparative review in May 2007.) I got my links from CNet Downloads or the brand sight.
http://www.intego.com/
http://www.bitdefender.com/
http://www.download.com/Antivirus/3150-2228_4-0.html?tag=bc
Here is just some of the info on ClamXav
Hope I was of help,
Thomas
"Title : ClamXav "freshclam" Insecure Permissions Information Disclosure Vulnerability
Advisory ID : FrSIRT/ADV-2006-1807
CVE ID : CVE-2006-2427
Rated as : Low Risk
Remotely Exploitable : No
Locally Exploitable : Yes
Release Date : 2006-05-15"

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    Hi,
    Pl tell me which free antivirus is best for my macbook. I was previously using Clamxav and it detected around 50 Windows virus from pendrive but i couldnot delete the virus so i unstalled it.
    Pl suggest me which antivirus to use.

    The pen drive includes what sort of data, and the data was transferred from a PC you own or have access to, or from a PC owned by someone else?
    A Windows virus cannot affect or infect OS X, but if the data is forwarded to a Windows user who does not use antivirus or does not keep their antivirus definitions up to date, it will cause problems for such a Windows user.
    Clamxav is the best free antivirus software for OS X, and I'm not aware of any other free antivirus for OS X.
    If the data on the pen drive was transferred from a PC you own or have access to, run the antivirus software on that PC for the data on the pen drive.

  • Some good antivirus apps either paid or free for Snow Leopard/Leopard

    Any suggestions? Want to do Home Sharing too so have read some things that sometimes av apps mess with it. Dont care if the av app is paid or free. Would prefer free to start and then buy one.

    Seconding Matthew's motion:
    There are no viruses that run on OSX. None. Zip. Zero.
    There is some "malware," such as Trojans, for Macs, though. But (unlike viruses that can get onto your system without your knowledge), you must approve their installation (via your Admin password) and/or operation (via the "This application was downloaded from the internet ..." prompt).
    Appropriately enough, some of these Trojans are included in pirated versions of Apple software, such as iWork!
    (If you're running Windoze on your Mac, that's the same as running it on a PC, so it needs all the same anti-everything stuff you'd use on a PC.)
    For the gory details, see Thomas Reed's [Mac Virus Guide|http://www.reedcorner.net/guides/macvirus].

  • Can't open Aperture after Snow Leopard to Mavericks upgrade.

    Upgraded to Mavericks from Snow Leopard. Now, the Aperture icon in the dock is greyed out. When I try to open it I get the message that I have Aperture 3.2.4 and it can't be opened with Mavericks. I purchased Aperture from the App Store when I had Snow Leopard and it shows in my purchases list, but when I check for available updates nothing shows. I have US English in my preferences, and Aperture is in my Applications file. I tried to update Aperture with 3.4.4 as an interim step from the Apple website, but got the message that I had to update from the App Store.
    Any help appreciated.
    Russ

    Could there be anything interfering with the App Store connecting to Apple's servers? Firewall, antivirus filters? Any problems with your AppleID? Credit card expired, the answers to your security questions too short, an too simple password?
    In some cases it will help, to boot into Safe Mode before connecting to the AppStore. Try to load the updates page while booted into Safe mode, see:  Mac OS X: Starting up in Safe Mode

  • G5 Tower crashes on sleep after Leopard upgrade

    I recently "upgraded" from Tiger (10.4.11) to Leopard (!0.5.8). Now, automatic sleep doesn't work. But worse, when I force sleep, the G5 crashes every time (turbo fans come on) within 5 min of sleep - the machine is unresponsive requiring a forced shut down. I have tried forcing sleep when no apps are running (except the OS). I do not have any antivirus SW. I'm thinking of trying to sleep in safe mode to see whether it's any of the apps that load at startup or as root, but other than that, I'm clueless on what to do since this appears to be an OS issue. Comments and strategies would be very helpful.
    BTW, there 54GB of free HDD space, there is 2.6 GB of ram and have recently run DiskWarrior on the HDD in case any of this matters.
    John

    Nice tech note. I've always tried to decipher what was in those logs. This helps but not in this case. I've copied the crash log that was generated below. Incidentally, I also tried booting back into a Tiger mirrored drive (I will keep them until I'm completely comfortable with the Leopard install, WHICH I'M NOT). Slept and woke as it should. So it's definitely the Leopard install but why? I'm still not quite sure what is going on. Do you?
    Mon Feb 8 22:54:56 2010
    Unresolved kernel trap(cpu 0): 0x400 - Inst access DAR=0x00000000E00F5000 PC=0x0000000000000000
    Latest crash info for cpu 0:
    Exception state (sv=0x5ab72c80)
    PC=0x00000000; MSR=0x40009030; DAR=0xE00F5000; DSISR=0x40000000; LR=0x00354890; R1=0x5AB67B40; XCP=0x00000010 (0x400 - Inst access)
    Backtrace:
    0x605F6EAC 0x003566B8 0x5ADE5A64 0x00340AD4 0x5ADE74D8 0x00376BA4
    0x00092E08 0x0002C1B4 0x00024C88 0x000B264C 0x4A714674
    backtrace terminated - frame not mapped or invalid: 0xBFFFE430
    Kernel loadable modules in backtrace (with dependencies):
    com.apple.iokit.IOUSBFamily(3.0.3)@0x605e0000->0x60614fff
    com.apple.iokit.IOHIDFamily(1.5)@0x5ade2000->0x5ae2bfff
    Proceeding back via exception chain:
    Exception state (sv=0x5ab72c80)
    previously dumped as "Latest" state. skipping...
    Exception state (sv=0x603c2000)
    PC=0x946A09D8; MSR=0x0200F030; DAR=0xE00FF000; DSISR=0x42000000; LR=0x946A7900; R1=0xBFFFE430; XCP=0x00000030 (0xC00 - System call)
    BSD process name corresponding to current thread: loginwindow
    Mac OS version:
    9A581
    Kernel version:
    Darwin Kernel Version 9.0.0: Tue Oct 9 21:37:58 PDT 2007; root:xnu-1228~1/RELEASE_PPC
    panic(cpu 0 caller 0xFFFF0004): 0x400 - Inst access
    Latest stack backtrace for cpu 0:
    Backtrace:
    0x0009AD18 0x0009B6BC 0x00029DC4 0x000AEC10 0x000B22F8
    Proceeding back via exception chain:
    Exception state (sv=0x5ab72c80)
    PC=0x00000000; MSR=0x40009030; DAR=0xE00F5000; DSISR=0x40000000; LR=0x00354890; R1=0x5AB67B40; XCP=0x00000010 (0x400 - Inst access)
    Backtrace:
    0x605F6EAC 0x003566B8 0x5ADE5A64 0x00340AD4 0x5ADE74D8 0x00376BA4
    0x00092E08 0x0002C1B4 0x00024C88 0x000B264C 0x4A714674
    backtrace terminated - frame not mapped or invalid: 0xBFFFE430
    Kernel loadable modules in backtrace (with dependencies):
    com.apple.iokit.IOUSBFamily(3.0.3)@0x605e0000->0x60614fff
    com.apple.iokit.IOHIDFamily(1.5)@0x5ade2000->0x5ae2bfff
    Exception state (sv=0x603c2000)
    PC=0x946A09D8; MSR=0x0200F030; DAR=0xE00FF000; DSISR=0x42000000; LR=0x946A7900; R1=0xBFFFE430; XCP=0x00000030 (0xC00 - System call)
    BSD process name corresponding to current thread: loginwindow
    Message was edited by: tympani

  • Frequent Kernel Panics on Snow Leopard 10.6.8

    I recently bought a used MacbookPro5,1 with a 2,4 Ghz Core2Duo Processor. It was upgraded to 4 GB of RAM and a 750GB HDD by the previous owner. When I received it yesterday, it was running 10.6.3, I think. It worked flawlessly for the first couple of hours. Then I downloaded the update to 10.6.8. No Problems. After that, it wanted to download and install even more updates for iTunes, Java, and the like. During this update process the Macbook had its first Kernel Panic. It was followed by 3 or 4 more during the next couple hours, with no particular pattern. (Browsing the web, gaming, etc.)
    I did run a memtest, and it crashed the first time I was running it. However, I was doing other tasks at the same time. The second time, I ran 2 memtests, with absolutely no problems.
    The last Kernel Panic occurred while I tried to uninstall the Avast antivirus I had installed, since I suspected it as a cause for the panics. After unistall, I had no more panics.
    Today, I used the Macbook for a couple of hours without any problems. I spent a lot of the time playing a 3D game from the app store. No problems. Then, another kernel panic while watching a youtube video, and another a couple hours later while just browsing facebook. I did another memtest, still nothing.
    I then uninstalled firefox, thinking it might be the problem, since it was involved in most of the panics.
    I was able to use the laptop for a couple of hours, and now it had another panic while watching a video on safari...
    Here is the most recent crash log from just a few minutes ago:
    Mon Aug 12 00:37:58 2013
    Machine-check capabilities (cpu 1) 0x0000000000000806:
    family: 6 model: 23 stepping: 6 microcode: 1548
    Intel(R) Core(TM)2 Duo CPU    P8600  @ 2.40GHz
    6 error-reporting banks
    threshold-based error status present
    Machine-check status 0x0000000000000004:
    machine-check in progress
    MCA error-reporting registers:
    IA32_MC0_STATUS(0x401): 0x1000000000000000 invalid
    IA32_MC1_STATUS(0x405): 0x0000000000000000 invalid
    IA32_MC2_STATUS(0x409): 0x0000000000000000 invalid
    IA32_MC3_STATUS(0x40d): 0xb62000050002010a valid
      MCA error code:            0x010a
      Model specific error code: 0x0002
      Other information:        0x00000005
      Threshold-based status:    Green
      Status bits:
      Processor context corrupt
      ADDR register valid
      Error enabled
      Uncorrected error
    IA32_MC3_ADDR(0x40e): 0x00000000a5cce590
    IA32_MC4_STATUS(0x411): 0x0000000000000011 invalid
    IA32_MC5_STATUS(0x415): 0xb200003008000e0f valid
      MCA error code:            0x0e0f
      Model specific error code: 0x0800
      Other information:        0x00000030
      Threshold-based status:    No tracking
      Status bits:
      Processor context corrupt
      Error enabled
      Uncorrected error
    panic(cpu 1 caller 0x2aaeab): Machine Check thread:0x946f000, trapno:0x12, err:0x0, registers:
    CR0: 0x80010033, CR2: 0x0145f000, CR3: 0xa2359000, CR4: 0x00000660
    RAX: 0x0000000000000003, RBX: 0x0000000000000165, RCX: 0x000000011de41d40, RDX: 0x0000000000000380
    RSP: 0x00007fff5fbfdbc0, RBP: 0x00007fff5fbfdbc0, RSI: 0x000000011de14aa0, RDI: 0x000000012135c540
    R8:  0x0000000000000370, R9:  0x000000000009b500, R10: 0x0000000000000360, R11: 0x00007fff5fbfde20
    R12: 0x0000000000026b80, R13: 0x000000011ddc7000, R14: 0x0000000000000163, R15: 0x0000000000000380
    RFL: 0x0000000000010206, RIP: 0x0000000113e37bbd, CR2: 0x000000010145f000
    Backtrace (CPU 1), Frame : Return Address (4 potential args on stack)
    0x52bddf78 : 0x21b837 (0x5dd7fc 0x52bddfac 0x223ce1 0x0)
    0x52bddfc8 : 0x2aaeab (0x59de64 0x59e0d1 0x946f000 0x12)
    0x52bde0b8 : 0x2a29f2 (0x1 0xf 0x2135c540 0x1)
    BSD process name corresponding to current thread: PluginProcess
    Mac OS version:
    10K549
    Kernel version:
    Darwin Kernel Version 10.8.0: Tue Jun  7 16:33:36 PDT 2011; root:xnu-1504.15.3~1/RELEASE_I386
    System model name: MacBookPro5,1 (Mac-F42D86C8)
    System uptime in nanoseconds: 6740727064321
    unloaded kexts:
    com.apple.driver.AppleFileSystemDriver    2.0 (addr 0x11f8000, size 0x12288) - last unloaded 94366220397
    loaded kexts:
    com.apple.driver.AppleHWSensor    1.9.3d0 - last loaded 10785646479
    com.apple.filesystems.autofs    2.1.0
    com.apple.driver.AGPM    100.12.31
    com.apple.driver.AppleMikeyHIDDriver    1.2.0
    com.apple.driver.AppleHDA    2.0.5f14
    com.apple.driver.AppleUpstreamUserClient    3.5.7
    com.apple.driver.AppleMCCSControl    1.0.20
    com.apple.driver.AppleMikeyDriver    2.0.5f14
    com.apple.driver.AudioAUUC    1.57
    com.apple.kext.AppleSMCLMU    1.5.2d10
    com.apple.driver.SMCMotionSensor    3.0.1d2
    com.apple.Dont_Steal_Mac_OS_X    7.0.0
    com.apple.driver.AudioIPCDriver    1.1.6
    com.apple.driver.AppleIntelPenrynProfile    17
    com.apple.driver.ACPI_SMC_PlatformPlugin    4.7.0a1
    com.apple.GeForce    6.3.6
    com.apple.driver.AppleLPC    1.5.1
    com.apple.driver.AppleGraphicsControl    2.10.6
    com.apple.driver.AppleUSBTCButtons    201.6
    com.apple.driver.AppleUSBTCKeyboard    201.6
    com.apple.driver.AppleIRController    303.8
    com.apple.iokit.SCSITaskUserClient    2.6.8
    com.apple.iokit.IOAHCIBlockStorage    1.6.4
    com.apple.driver.AppleHPET    1.5
    com.apple.driver.AppleFWOHCI    4.7.3
    com.apple.driver.AirPortBrcm43224    428.42.4
    com.apple.driver.AppleUSBHub    4.2.4
    com.apple.driver.AppleAHCIPort    2.1.7
    com.apple.nvenet    2.0.17
    com.apple.driver.AppleUSBEHCI    4.2.4
    com.apple.driver.AppleUSBOHCI    4.2.0
    com.apple.BootCache    31.1
    com.apple.AppleFSCompression.AppleFSCompressionTypeZlib    1.0.0d1
    com.apple.driver.AppleSmartBatteryManager    160.0.0
    com.apple.driver.AppleEFINVRAM    1.4.0
    com.apple.driver.AppleRTC    1.3.1
    com.apple.driver.AppleACPIButtons    1.3.6
    com.apple.driver.AppleSMBIOS    1.7
    com.apple.driver.AppleACPIEC    1.3.6
    com.apple.driver.AppleAPIC    1.4
    com.apple.driver.AppleIntelCPUPowerManagementClient    142.6.0
    com.apple.security.sandbox    1
    com.apple.security.quarantine    0
    com.apple.nke.applicationfirewall    2.1.14
    com.apple.driver.AppleIntelCPUPowerManagement    142.6.0
    com.apple.driver.DspFuncLib    2.0.5f14
    com.apple.driver.AppleProfileReadCounterAction    17
    com.apple.driver.AppleProfileTimestampAction    10
    com.apple.driver.AppleProfileThreadInfoAction    14
    com.apple.driver.AppleProfileRegisterStateAction    10
    com.apple.driver.AppleProfileKEventAction    10
    com.apple.driver.AppleProfileCallstackAction    20
    com.apple.driver.AppleSMBusController    1.0.10d0
    com.apple.nvidia.nv50hal    6.3.6
    com.apple.iokit.IOFireWireIP    2.0.3
    com.apple.iokit.IOSurface    74.2
    com.apple.iokit.IOBluetoothSerialManager    2.4.5f3
    com.apple.iokit.IOSerialFamily    10.0.3
    com.apple.iokit.IOAudioFamily    1.8.3fc2
    com.apple.kext.OSvKernDSPLib    1.3
    com.apple.driver.AppleHDAController    2.0.5f14
    com.apple.iokit.IOHDAFamily    2.0.5f14
    com.apple.iokit.AppleProfileFamily    41
    com.apple.driver.AppleSMC    3.1.0d5
    com.apple.driver.IOPlatformPluginFamily    4.7.0a1
    com.apple.driver.AppleSMBusPCI    1.0.10d0
    com.apple.NVDAResman    6.3.6
    com.apple.driver.AppleBacklightExpert    1.0.1
    com.apple.iokit.IONDRVSupport    2.2.1
    com.apple.iokit.IOGraphicsFamily    2.2.1
    com.apple.driver.AppleUSBMultitouch    207.7
    com.apple.iokit.IOUSBHIDDriver    4.2.0
    com.apple.driver.BroadcomUSBBluetoothHCIController    2.4.5f3
    com.apple.driver.AppleUSBBluetoothHCIController    2.4.5f3
    com.apple.iokit.IOBluetoothFamily    2.4.5f3
    com.apple.driver.AppleUSBMergeNub    4.2.4
    com.apple.driver.AppleUSBComposite    3.9.0
    com.apple.iokit.IOSCSIMultimediaCommandsDevice    2.6.8
    com.apple.iokit.IOBDStorageFamily    1.6
    com.apple.iokit.IODVDStorageFamily    1.6
    com.apple.iokit.IOCDStorageFamily    1.6.1
    com.apple.driver.XsanFilter    402.1
    com.apple.iokit.IOAHCISerialATAPI    1.2.6
    com.apple.iokit.IOSCSIArchitectureModelFamily    2.6.8
    com.apple.iokit.IOFireWireFamily    4.2.6
    com.apple.iokit.IO80211Family    320.1
    com.apple.iokit.IOUSBUserClient    4.2.4
    com.apple.iokit.IOAHCIFamily    2.0.6
    com.apple.iokit.IOUSBFamily    4.2.4
    com.apple.driver.NVSMU    2.2.7
    com.apple.iokit.IONetworkingFamily    1.10
    com.apple.driver.AppleEFIRuntime    1.4.0
    com.apple.iokit.IOHIDFamily    1.6.6
    com.apple.iokit.IOSMBusFamily    1.1
    com.apple.kext.AppleMatch    1.0.0d1
    com.apple.security.TMSafetyNet    6
    com.apple.driver.DiskImages    289.1
    com.apple.iokit.IOStorageFamily    1.6.3
    com.apple.driver.AppleACPIPlatform    1.3.6
    com.apple.iokit.IOPCIFamily    2.6.5
    com.apple.iokit.IOACPIFamily    1.3.0
    I hope any of you guys can help me solve this problem. I really don't know what to do. I really hope its not hardware related. If you need any more information please tell me.

    I assume you have working installer discs? If so here's a suggestion:
    Clean Install of Snow Leopard
    Be sure you backup your files to an external drive or second internal drive because the following procedure will remove everything from the hard drive.
         1. Boot the computer using the Snow Leopard Installer Disc.  Insert the disc into the
             optical drive and restart the computer.  After the chime press and hold down the
             "C" key.  Release the key when you see a small spinning gear appear below the
             dark gray Apple logo.
         2. After the installer loads select your language and click on the Continue
             button. When the menu bar appears select Disk Utility from the Utilities menu.
             After DU loads select the hard drive entry from the left side list (mfgr.'s ID and drive
             size.)  Click on the Partition tab in the DU main window.  Set the number of
             partitions to one (1) from the Partitions drop down menu, set the format type to Mac
             OS Extended (Journaled, if supported), then click on the Partition button.
         3. When the formatting has completed quit DU and return to the installer.  Proceed
             with the OS X installation and follow the directions included with the installer.
         4. When the installation has completed your computer will Restart into the Setup
             Assistant. Be sure you configure your initial admin account with the exact same
             username and password that you used on your old drive. After you finish Setup
             Assistant will complete the installation after which you will be running a fresh
             install of OS X.  You can now begin the update process by opening Software
             Update and installing all recommended updates to bring your installation current.

  • Backing up crashes Leopard!

    Since installing and updating Leopard to 10.5.1 on my G4 Mac mini, I have been unable to backup my system since any attempt to do so crashes OS X altogether. I am using a partitioned 500 GB SimpleTech USB external hard drive, partitioned into 2 equal partitions, one for this Mac mini and one for my G4 iBook (though I don't use it for the iBook anymore since getting a separate firewire ext HD for the iBook, which works well for backups). Previously with 10.4, I was able to back up the Mac mini system using the SuperDuper backup software program. Now, with Leopard installed, the Mac mini system backs up a little over half way and then OS X 10.5.1 Leopard crashes completely. This happens whether I use Time Machine or SuperDuper, and has happened repeatedly. I have repeatedly reported the crash to Apple when the screen presents the option, but have of course received no solution and therefore cannot backup my G4 Mac mini. As Time Machine backs up the first halfway or so, it indicates that I have plenty of available space on the external HD and I emphasize that backups were ALWAYS successful with OS 10.4 Tiger. Is the problem my external HD and would it help to try to erase it completely and remove the partition, since it isn't used anymore for the iBook? I find it strange to think that the external HD could repeatedly crash the Mac mini's OS X Leopard during back ups, but I'd be willing to erase it if that would help.
    I would be VERY grateful for any help. Thank you.

    JVIRANT wrote:
    Yes, I did. To make sure, I just re-erased it. Also, I'm going to try backing up again, this time with Norton Antivirus AutoProtect off. I'm not sure if that will make any difference. I assume that a USB ext HD should be functional for backups rather than requiring a firewire. Thank you for your ongoing help!
    While AV is a good thing, it is not really necessary for a Mac, and it certainly can cause problems with backups and recovering from a backup.
    I have never used an AV on either of my MBPs and so far nothing has hit them.
    Yes with the Vista and XP on my other partitions I use AVG, but that's something completely different.
    I used to use Virex on my G5, but since they started charging, I let it go since they no longer support Leopard free.

  • HT1338 I cannot access my iphoto application on my imac as it says I have made changes in Iphoto using a newer version. We have recently purchased a Macbook Air and this has Lion (as opposed to leopard on the iMac) and we are sharing photos between the 2?

    I cannot access my iphoto application on my imac as it says I have made changes in Iphoto using a newer version. We have recently purchased a Macbook Air and this has Lion (as opposed to leopard on the iMac) and we are sharing photos between the 2.  I am awaiting the upgrade discs for snow leopard and then to Lion for the iMac but is there a way to access my photos until this arrives?

    Do a malware check with several malware scanning programs on the Windows computer.
    Please scan with all programs because each program detects different malware.
    All these programs have free versions.
    Make sure that you update each program to get the latest version of their databases before doing a scan.
    *Malwarebytes' Anti-Malware:<br>http://www.malwarebytes.org/mbam.php
    *AdwCleaner:<br>http://www.bleepingcomputer.com/download/adwcleaner/<br>http://www.softpedia.com/get/Antivirus/Removal-Tools/AdwCleaner.shtml
    *SuperAntispyware:<br>http://www.superantispyware.com/
    *Microsoft Safety Scanner:<br>http://www.microsoft.com/security/scanner/en-us/default.aspx
    *Windows Defender:<br>http://windows.microsoft.com/en-us/windows/using-defender
    *Spybot Search & Destroy:<br>http://www.safer-networking.org/en/index.html
    *Kasperky Free Security Scan:<br>http://www.kaspersky.com/security-scan
    You can also do a check for a rootkit infection with TDSSKiller.
    *Anti-rootkit utility TDSSKiller:<br>http://support.kaspersky.com/5350?el=88446
    See also:
    *"Spyware on Windows": http://kb.mozillazine.org/Popups_not_blocked

  • We need to upgrade from Leopard to Snow Leopard and then on up the chain. How?

    We have an old MacBook running Leopard (10.5.8). Can we upgrade to Snow Leopard and then add others gradually untill we get to the newest version? If so, were can we find a copy of Snow Leopard?

    Before embarking on a major OS upgrade, it would be wise, advisable and very prudent if you backup your current system to an external connected and Mac formatted Flash drive OR externally connected USB, Thunderbolt or FireWire 800, Mac formatted hard drive. Then, use either OS X Time Machine app to backup your entire system to the external drive OR purchase, install and use a data cloning app, like CarbonCopyCloner or SuperDuper, to make an exact and bootable copy (clone) of your entire Mac's internal hard drive. This step is really needed in case something goes wrong with the install of the new OS or you simply do not like the new OS, you have a very easy way/procedure to return your Mac to its former working state.
    Then, determine if your Mac meets ALL minimum system install requirements.
    To install Yosemite, you need one of these Macs:
    iMac (Mid-2007 or later)
    MacBook (13-inch Aluminum, Late 2008), (13-inch, Early 2009 or later)
    MacBook Pro (13-inch, Mid-2009 or later),
    MacBook Pro (15-inch or 17-inch, Mid/Late 2007 or later)
    MacBook Air (Late 2008 or later)
    Mac mini (Early 2009 or later)
    Mac Pro (Early 2008 or later)
    Xserve (Early 2009)
    Your Mac also needs:
    OS X Mavericks,  Mountain Lion, Lion, or Snow Leopard v10.6.8 already installed
    2 GB or more of memory (I strongly advise, at least, 4 GBs of RAM or more)
    8 GB or more of available space
    Next,
    If you run any older Mac software from the earlier PowerPC Macs, then none of this software will work with the newer OS X versions (10.7 and onward). OS X Snow Leopard had a magical and invisible PowerPC emulation application, called Rosetta, that worked seamlessly in the background that still allowed older PowerPC coded software to still operate in a Intel CPU Mac.
    The use of Rosetta ended with OS X Snow Leopard as the Rosetta application was licensed to Apple, from a software company called Transitive, which got bought out, I believe, by IBM and Appe  could no longer secure their rights to continue to use Rosetta in later versions of OS X.
    So, you would need to check to see if you have software on your Mac that maybe older than, say, 2006 or older.
    Also, check for app compatibilty  here.
    http://roaringapps.com/
    If you have any commercial antivirus installed and/or hard drive cleaning apps installed on your Mac, like MacKeeper, CleanMyMac, TuneUpMyMac, MacCleanse, etc. now would be a good time to completely uninstall this apps by doing a Google search to learn how to properly uninstall these types of apps.
    These types of apps will only cause your Mac issues later after the install of the new OS X version and you will have to completely uninstall these types of apps later.
    Once you have determined all of this, you should be able to find the latest version of OS X Yosemite by clicking on the Mac App Store icon in the OS X Dock and then login to the Mac App Store using your Apple ID and password.
    You can then begin the download and installation process of installing OS X 10.10 Yosemite from the Mac App Store.
    Good Luck!

  • HT1349 Where can I find the antivirus software of my IMAC?

    WHERE can I find the antivirus software of my IMAC?

    There is none. It's already built-in to the OS. You do not need to install any third-party AV software.
    Helpful Links Regarding Malware Protection
    An excellent link to read is Tom Reed's Mac Malware Guide.
    Also, visit The XLab FAQs and read Detecting and avoiding malware and spyware.
    See these Apple articles:
              Mac OS X Snow Leopard and malware detection
              OS X Lion- Protect your Mac from malware
              OS X Mountain Lion- Protect your Mac from malware
              About file quarantine in OS X
    If you require anti-virus protection I recommend using ClamXav.

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