Digidesign Coreaudio 7.1 might be causing capture issues with ADVC100

I'm having a problem that seemingly reared it's ugly head after I installed ProTols 7.1 and Coreaudio 7.1 that is presenting itself over FCPHD and iMovie. Neither is recognizing the ADVC100 at all, FCP warns about it not being connected when booting and it's also having problems seeing the Digi 002 both of which under OSX.3.9 worked fine. I had iMovie working fine with the ADVC but I'm certain after installing Coreaudio 7.0 it refused to see the ADVC anymore and upgrading to 7.1 did not fix the problem. Anyone else experiencing this or similar issues?

I sorta doubt the install caused the problem... but reinstalling QuickTime might help... the ADVC works much like a camera with FCP, so should be worth a try anyway: Read here: http://docs.info.apple.com/article.html?artnum=301852
Jerry

Similar Messages

Macam or Parian cause capture issues???

Hello all - I've been having capture issues with my HDV stuff (Crashes during capture - I posted the details under 'Crash under HDV log and Capture' if anyone can help me out with that issue and this is slightly related...
People elsewhere say that Macam or Parian can affect Final Cut - any experiences with that? any other programs that I should avoid that could negatively affect my fcp performance?
Thanks!
- John

I'm using FCP7 on Snow Leopard.
Any idea as to what could cause fcp to crash during capture (HDV to ProRes) if it's worked more then a dozen times prior??? Any other programs could affect such things? Nothing has been installed or changed on my system in over a month.

Auto adjustment of page orientation causes printing issues with documents that have a page width greater than its page height.

Hi,
Since an upgrade from Word 2003 to Word 2010, we are experiencing printing issues with certain
documents that have a page width greater than its page height.
In Word 2003, it was no problem to set the page width greater than the page height while setting the page orientation to "portrait".
In Word 2010, this seems impossible: despite leaving the page orientation to "portrait", if one changes the page width/height as stated,
Word 2010 automatically adjusts the orientation to "landscape". Resetting the orientation to "portrait" will flip the page's width/heigth settings.
This behaviour causes printing problems: the page prints out 90° rotated.
I do not believe this is a printer driver issue: I tried several different printer drivers, and all give the same (bad) result. Setting the printer driver's page orientation settings (before printing) makes no difference, as
Word 2010 seems to force the page orientation settings.
Inserting the documents 90° rotated is not an option, since it causes problems with the printing margins.
This is very annoying, since we have to print official documents of a municipality (driver's licences).
Is there a workaround for this issue?
Regards,
Laurent Grandgaignage
Sysadmin Gemeentebestuur Stabroek, Belgium

Hi
Thank you for using
Microsoft Office for IT Professionals Forums.
From your description, we can follow these steps to test this issue
Step 1: Repair Office 2010
1.
Click
Start, and then click Control Panel.
2.
Click
Programs and Features.
3.
Click the
Office 2010 program that you want to repair, and then click
Change.
4.
Click
Repair, and then click Continue. You might need to restart your computer after the repair is complete.
Step 2:
Rename the global template (Normal.dotm)Follow the steps for the operating system that you are using:
Windows Vista and Windows 7
a)
Exit Word 2010
b)
Click
Start.
c)
In the
Start Search box, type the following text, and then press
ENTER:
1.
%userprofile%\appdata\roaming\microsoft\templates
d)
Right-click
Normal.dotm, and then click Rename.
e)
Type
Oldword.old, and then press ENTER.
Microsoft Windows XP
a)
Exit Word 2010
b)
Click
Start, and then click Run.
c)
In the
Open box, type the following text, and then press ENTER:
%userprofile%\Application Data\Microsoft\Templates
d)
Right-click
Normal.dotm, and then click Rename.
e)
Type
Oldword.old, and then press ENTER.
f)
Close Windows Explorer.
How to troubleshoot print failures in Word 2010, Word 2007, and Word 2003
http://support.microsoft.com/kb/826845
Please take your time to try the suggestions and let me know the results at your earliest convenience. If anything is unclear or if there is anything
I can do for you, please feel free to let me know.
Hope that helps.
Sincerely
William Zhou CHNPlease remember to mark the replies as answers if they help and unmark them if they provide no help.

(Video) Moving Layer Causing Lag Issue with Latest Photoshop CC (12-14-2014)

Video: https://www.youtube.com/watch?v=EQPtBTrjfzw
I have a 218 MB PSD file that is causing me major headaches. Any time I start up the file, dragging a single layer goes at about 2 frames per second. However, if I delete one layer or simply cut and paste a layer, the lag is fixed.
From the video:
- Deleting a hidden layer fixes the lag
- Removing one background layer fixes the lag
- Cutting and pasting any background layer onto a new layer fixes the lag...
Saving and returning to the doc causes it to lag again.
Anyone know what's going on? Photoshop Preferences:
Other Notes:
- Happens in both 32 bit and 64 bit versions
- I have the same issue with Photoshop CC 2014.

Here is my problem:
https://www.youtube.com/watch?v=bCMbASsil7Y
Any solutions?
Adobe CC, W8.1, 16GB RAM, Nvidia GTX980, Intel i4790k, SSD..

Could the old outlets in my buildings be causing the issues with my imac?

After recieving an i-mac I had every single possible problem go wrong with the computer. Every IT person, genius bar employee and fellow mac users were stumped. Recieved a refund and upgraded to a newer i-mac only to start having the same problems. Looking at all the controls in the situation I have begun to wonder could the outlets in the building I work be causing the problems. I recently heard that if the outlets are old and dont supply the proper wattage or something like this it can cause random failures on Macs. Am I crazy or should I just stop using computers?

You just might have a bad ground in your building or lack of ground.
At the point where power comes into the building a stake is driven at least four feet in the ground and then a wire attached to your breaker box. The round lug and the big flat lug should be connected to the breaker box where service enteres the building. The small lug is the hot connection also connected to a breaker in your box. If this is not the case you will have problems.
You can buy an inexpensive tester at your home store to check the wiring of your outlets. Your Mac doesn't draw a huge amount of power so I would doubt it's a lack of power however low voltage can cause problems but you would notice problems with other appliances in your home.
Get the three pronged tester check your outlets for correct wiring. If you or someone knows how to use a volt meter, check the voltage especially the outlet for the IMac.
If to many devices are connected on the same circuit you can have problems. Refrigerators and other hard start appliances can cause a sag of voltage. Try a different circuit.
If you feel funny about electricity or you detect ground faults or low voltage, by all means call an electrician.
Your phone/DSL or cable connection should also be grounded so have that checked out as well. Hope this helps.

Mavericks 10.9.2 is causing major issues with my computer. Bouncing balls, lagging, etc. etc. Should I revert?

I'm not a techy, but I did see on another thread to run EtreCheck. I called up Apple Support a few months ago, before Mavericks, as my system was running slower.   The Apple tech said I have plenty of room on my hard drive and to just delete stuff of of my desktop. So I did - didn't really help. I am assuming my RAM space stinks and that is why it is in red? What should I do next? So here is my report:
Hardware Information:
          MacBook Pro (13-inch, Mid 2009)
          MacBook Pro - model: MacBookPro5,5
          1 2.26 GHz Intel Core 2 Duo CPU: 2 cores
          2 GB RAM
Video Information:
          NVIDIA GeForce 9400M - VRAM: 256 MB
System Software:
          OS X 10.9.2 (13C64) - Uptime: 0 days 3:2:38
Disk Information:
          Hitachi HTS545016B9SA02 disk0 : (160.04 GB)
                    EFI (disk0s1) <not mounted>: 209.7 MB
                    Macintosh HD (disk0s2) / [Startup]: 159.18 GB (28.34 GB free)
                    Recovery HD (disk0s3) <not mounted>: 650 MB
          MATSHITADVD-R   UJ-868
USB Information:
          Apple Inc. Built-in iSight
          Apple Internal Memory Card Reader
          Apple Inc. Apple Internal Keyboard / Trackpad
          Apple Computer, Inc. IR Receiver
          Logitech USB Receiver
          Apple Inc. BRCM2046 Hub
                    Apple Inc. Bluetooth USB Host Controller
Thunderbolt Information:
Gatekeeper:
          Mac App Store and identified developers
Kernel Extensions:
          [not loaded] com.Belcarra.iokit.USBLAN_netpart (2.0.2) Support
          [not loaded] com.Belcarra.iokit.USBLAN_usbpart (2.0.2) Support
          [not loaded] com.FTDI.driver.FTDIUSBSerialDriver (2.2.14) Support
          [not loaded] com.RemoteControl.USBLAN.panther (1.6.1) Support
          [not loaded] com.RemoteControl.USBLAN.usbpart (2.0.6) Support
          [not loaded] com.belcarra.iokit.netpart.panther (1.6.1) Support
          [not loaded] com.belcarra.iokit.usbpart.panther (1.6.1) Support
          [not loaded] com.bodymedia.codelessAB185.kext (1) Support
Launch Daemons:
          [loaded] com.adobe.fpsaud.plist Support
          [running] com.fitbit.galileod.plist Support
          [loaded] com.microsoft.office.licensing.helper.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
          [loaded] com.google.keystone.agent.plist Support
          [loaded] com.iLike.Agent.plist Support
User Login Items:
          SpeechSynthesisServer
          BodyMedia SYNC
          iTunesHelper
          Fitbit Connect Menubar Helper
          HP Scheduler
Internet Plug-ins:
          FlashPlayer-10.6: Version: 13.0.0.206 - SDK 10.6 Support
          Default Browser: Version: 537 - SDK 10.9
          AdobePDFViewerNPAPI: Version: 11.0.06 - SDK 10.6 Support
          AdobePDFViewer: Version: 11.0.06 - SDK 10.6 Support
          Flash Player: Version: 13.0.0.206 - SDK 10.6 Support
          LogitechHarmony: Version: 1.0.0.1 Support
          QuickTime Plugin: Version: 7.7.3
          SharePointBrowserPlugin: Version: 14.1.0 Support
          GarminGpsControl: Version: 2.9.2.0 Release Support
          Silverlight: Version: 5.1.20913.0 - SDK 10.6 Support
          iPhotoPhotocast: Version: 7.0
Safari Extensions:
          SocialPlus!: Version: 2.5.2
          Facebook Cleaner: Version: 3.3
          AdBlock: Version: 2.6.30
          GMail Counter: Version: 0.9.3
          Facebook Photo Zoom: Version: 1.1206.11.1
          Pinterest: Version: 1.0
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 iTunes Plug-ins:
          iLike: Version: 1.0 Support
          PPC Bundle: Version: (null) Support
          iLike Bundle: Version: (null) Support
          Tiger Bundle: Version: (null) Support
User Internet Plug-ins:
          Move-Media-Player: Version: npmnqmp 071505000006 Support
          fbplugin_1_0_3: Version: (null) Support
          fbplugin_1_0_1: Version: (null) Support
          Picasa: Version: 1.0 Support
3rd Party Preference Panes:
          BodyMedia SYNC Support
          Flash Player Support
Time Machine:
          Skip System Files: NO
          Auto backup: YES
          Time Machine not configured!
Top Processes by CPU:
               3%          WindowServer
               3%          BodyMedia SYNC
               0%          Fitbit Connect Menubar Helper
               0%          Safari
               0%          fontd
Top Processes by Memory:
          203 MB          iTunes
          137 MB          Safari
          74 MB          Finder
          61 MB          com.apple.WebKit.WebContent
          57 MB          com.apple.MediaLibraryService
Virtual Memory Information:
          26 MB          Free RAM
          625 MB          Active RAM
          607 MB          Inactive RAM
          303 MB          Wired RAM
          638 MB          Page-ins
          37 MB          Page-outs

Hello,
Yes, your Mac is seriously lacking of RAM. 2 GBs of RAM simply will not cut it on OS X Mavericks.
The real world working minimum RAM is really 4 GBs and more is better of you can afford it.
Your year and model Mac can take a total of 8 GBs of RAM.
Correct and reliable Mac RAM can be purchased from online Mac RAM sources Crucial memory or OWC (macsales.com).
OWC carries that 8 GB RAM kit.
http://eshop.macsales.com/shop/memory/Apple_MacBook_MacBook_Pro/Upgrade/Macbook_ selector
Also, you have some older PowerPC Apps, extensions and plugins that need to be removed as older PowerPC applications no longer work on OS X since the introduction of OS X 10.7 Lion.
Kernel Extensions:
          [not loaded] com.Belcarra.iokit.USBLAN_netpart (2.0.2) Support
          [not loaded] com.Belcarra.iokit.USBLAN_usbpart (2.0.2) Support
          [not loaded] com.FTDI.driver.FTDIUSBSerialDriver (2.2.14) Support
          [not loaded] com.RemoteControl.USBLAN.panther (1.6.1) Support
          [not loaded] com.RemoteControl.USBLAN.usbpart (2.0.6) Support
          [not loaded] com.belcarra.iokit.netpart.panther (1.6.1) Support
          [not loaded] com.belcarra.iokit.usbpart.panther (1.6.1) Support
          [not loaded] com.bodymedia.codelessAB185.kext (1) Support
I do not know what all these are for, but if it is for connected hardware devices, you need to see if there are any new updates from each device maker's websites.
You appear to have two USB LAN remote control extensions that could be causing issues as one is for OS X 10.3 Panther and it is very old. The other one looks old, too!
If you do not use any of this hardware any longer on your Mac, you can find these to delete and Trash in the System>Library>Extensions folder.
User iTunes Plug-ins:
          iLike: Version: 1.0 Support
          PPC Bundle: Version: (null) Support
          iLike Bundle: Version: (null) Support
          Tiger Bundle: Version: (null) Support
These look like older PowerPC Pllugins. for iTunes which will no longer work.
These are in your User>Library folder which is hidden from the user, now (kinda ironic, that).
In the Finder, click the Go menu and hold the Option key. The Library folder will appear under the Go menu until you release the Option key.
Open this folder and look for the iTunes>Plugins folder and drag these to the Trash and empty.
Make sure to update all of your installed third party software if there are OS X Mavericks updates that can be applied.
You may need to, ACTUALLY, go the third party developers' websites if there are no updates through the Mac App Store.
Update all of your Web browser Internet plugins, extensions and add-ons also.
Also, if you have any connected third party devices, like non-Apple keyboards, mice, drawing tablets, hubs, card readers, etc, you need to update the drivers for these devices to OS X Mavericks compatible versions by going to the device makers' websites and search for newer software and driver updates.
After you have completed all these activities (minus the installation of new RAM) restart your Mac.
Good Luck!

Disabling Bonjour causes MAJOR issues with Itunes

In case anyone doesn't know, Itunes now ships with a service called Bonjour, which shares your files without asking you, online and via bluetooth.
Disabling this service makes Itunes completely unusable, therefore we are being FORCED to share our personal files without consent... how can this be legal?
Anyone know where/how/which version of itunes was the last without Bonjour?
Thanks,
Andrew

Wow I really didn't expect this post to be heard let alone be responded to in such detail! Thanks so much for listening to my frustrations..
Most of all I feel iTunes Match falls just short of what in needs to be because its missing a few minor features. With a minor update to how it works these issues could be completely resolved.
The cloud, in my opion, could act as more of a background operation.   If it was just a way to access music not already synced manually, it would allow for users to still control what music gets synced and the rest goes to the cloud.. in the background. Instead of removing the features that allow users to check with playlist, songs, albums and artists they want to sync, instead keep this option. The cloud would hold the complete library.
This minor difference would make it something that would not remove any existing functionality while still enjoying all the benefits of the cloud.
Until I get to have control of the sync manually and use the cloud I will have to cancel my itunes match because its causing more problems than it solves.
FYI all of my apple cloud services are currently off because of similar issues. There needs to be a ballance between simplicity and user control.
Steve's war with Google doesn't allow me to merge my contacts with theirs becasue you are specifically limiting it to happen. Google has to exploit loopholes to make everything sync by going around Apple's roadblocks.   Its a real bummer.

Last night's update causing XML issues with MAC and MS Word

I am running Snow Leopard on a MAC. Last night Firefox installed an update, and the software I use for work no longer works with Firefox. I use a custom built web app that uses XML code to take web created info and compile into a Word document. Until this latest update, the issue had been when creating the Word doc, extra XML code was being written for images causing them to show as blank in the Word document. Now, the document is being created but not with a .doc extension. I had been in contact with Microsoft about the first problem with no resolution. They were able to duplicate the problem. The first problem only happens on a MAC and is not specific to operating system. This new problem is only happening with Firefox, not Safari, and started today after the last update.

HI,
If you post a crash report, perhaps we can help.
If Safari has just crashed, press the Report button on the CrashReporter dialog box to view the crash information.
Now copy/paste the entire contents of the Crash Reporter window into your reply here. If the crash report dialog does not appear or the crash is hard to reproduce, crash logs can be retrieved from the ~/Library/Logs/CrashReporter> folder.
You may have Safari third party plugins that were compatible with your previous version of Safari but not Safari 5.0.1. It's the responsibility of third party developers to update their software, not Apple.
Follow the instructions here. Safari: Add-ons may cause Safari to unexpectedly quit or have performance issues
If indeed you had third party add-ons installed and Safari still crashes, then post a crash report.
Carolyn

Galaxy S4 KitKat Update Causing Major Issues With Data Speed and Text Messaging

Dear All,
My company has over 40 phone users and since the KitKat update has pushed out we are experiencing two major isssues:
Many of our phones are only getting 3G in places that historically before they had blazing fast 4G. Most message boards say to power off, remove the SIM card and replace. This gives only temporary relief. We get 4G for 10 minutes, and then it reverts to 3G, and it is slow 3G at that. I have seen where some have gone and gotten a replacement SIM, but they indicate this is not a long term solution. I have also seen that a hard reset/factory reset is being proposed. However, this seems ridiculous to do to over 40 devises where the obvious cause is the update. Has anyone found the answer to this one?
Many users, including myself are now having outbound text messages fail. We have to resend them over and over to get them to go through. This problem is pretty widespread through the device pool. I am unsure what could be causing this. The messages fail regardless of if the phone is connected to wireless or not.

I have had the same problem with my phone. Called tech support and after they contacted Samsung the solution is a factory reset to fix the problem and they are supposedly working on a fix for it. After doing the reset Friday, I have to restart my phone multiple times during the day to get messages to send. I also notice only 3G where we always had 4G. Called tech support again and was given the option to send phone in to have it repaired or get a refurb under warranty. Not sure what I am going to do yet but I can see it is definitely not just my phone. Of course the techs say they have not heard of this before.

Has the recent Itunes upgrade caused incompatibility issue with APPLE TV 1st gen?

after recent upgrade to itunes, itunes no longer recognizes data on my apple tv 1st gen....but the Apple TV still has them loaded. additonally this new itunes does not let me resync new songs or movies, etc. thoughts? thanks!

I'm having the exact same issue. Nothing in the "Music" menu except "My Music". I Noticed it this afternoon when I woke my Apple TV from standby. The disappearance, in my case, was not related to a reset. My Apple TV has not been reset since the power went out here several weeks ago. Though I obviously don't know for sure, I'm guessing that it's some kind of store problem and we most likely won't be able to correct it from our end.

SSL patch update has caused many issues with my iPhone 5c

Since the patch update completed, my iPhone is acting ridiculous. I cannot use safari. Every time I try to search something, it tells me it cannot connect to server. I also cannot delete voicemails. Once I delete, the phone freezes and the voicemail is not deleted. It comes back from deleted messages. When I hit the phone toggle button, it opens up my recent call list but it opens to the calls from Thursday, the day I did the update. It also deleted every text message that I had sent that day from my text history. I have shut the phone down, what other options do I have?

I have actually talked to a couple people that I know that have the 5c and it seems like it is a hit or miss. Some people have problems with the blue ones, im having issues with the white one, some people have no issues att all. COnsider your son luck that he has no problems. I have had problems with 3 different whote 5c over the coarse of 4 months now and contuining to have problems.

Import of mp3 file suddenly causing sync issue with existing files. CC 2014

Hi all,
I imported an mp3 audio file and dropped it into my comp which contained other Video (422 ProRes) files that contained audio. When I RAM Previewed the audio for the entire comp slowed down and fell out of sync. I can't seem to find any way to correct this. I have tried both Comp Settings and Interpret Footage but I can't seem to find a fix. Anyone know of (or have experienced) this issue and know of a fix? P.S. I know mp3 files are not optimal for use, but I used it anyway, and have in the past without issue.
Thanks,
JB

After rendering out two sequences that had the audio sync/slowing issue, it appears that this is an issue with RAM preview. The renders' audio are in sync and play at the correct speed. The issue of the RAM preview remains. It seems like a bug at this point. I updated to latest (13.2) version of AE CC 2014, reopened project, RAM previewed the comp and the audio was playing correctly. I RAM previewed again immediately again, and after a spinning beach ball, it plays back out of sync and slow again.

New motherboard: can it cause any issue with ProApps or Projetcs ?

My iMac G5 Ambiant Light is at the Apple Store to replace the motherboard.
Before the crash, I was working on FCP, DVD Studio Pro, Motion and Color projects.
(Final Cut Studio 2).
Will I have everything back in order after the motherboard replacement?
Anybody has experienced any problem with Pro Apps or projects after a motherboard replacement? Thanks!

Your apps are all on your drives.
The motherboard is not in the equation except it holds the processor and that is not changing, is it?
bogiesan

HV20/FCP6/FW Problems/Capture Issues/WTH?!?!?!?!?!

Hello everyone. I have a Canon HV20 that was working fine for a day or two while I was capturing both HDV and DV footage from MIni DV tapes. I opened the log and capture window after changing tapes and BAM! it said it couldn't find the deck.
At first, I set the app up just like the Apple site said, and everything worked perfectly, even when dumping DV footage. Cameras setting never changed from factory default. Now this, and what's worse is that my computer won't recognize the FW device. I do have a G-tech plugged in as well, and with no HV20 the computer recognizes it in the FW800 port, but as soon as I plug in the HV20 the computer doesn't recognize anything though the drive still operates.
I get this from FCP:
"Device is not connected or the capture preset is not setup correctly. You may still log offline clips.
This might also happen if you play DV footage in an HDV device."
I get this from System Profiler:
"FireWire Bus:
Warning: Unable to list FireWire devices.
Maximum Speed: Up to 800 Mb/sec"
If your advice is to purchase a new 17" MBP, I just might since i have had it with this POS right now.

Assuming the your FCP6 setup has not changed:
Canon cameras do not play well with other devices (hard drive for example) on the same FW bus. My son had capture issues with a Canon HV30 and G-Raid 2 on a 2007 Quad Mac Pro.
The work-around:
Capture to an internal drive and move the media to the external, switch scratch disk, and reconnect media. (not ideal).
The "fix":
Purchase a FW card for the MBP Express card slot and connect one of the FW devices to it. (Each device on different FW Buses.

My iMac running 10.10.2 keeps crashing several times a day. It does a automatic restart and gives me a option to send in a report. Any ideas what might be causing this?

My iMac does an automatic restart several times a day. It gives me a option to send in a "panic" report. This happens randomly during the day and night. Any idea of anything new that might be causing this? I am up to date on all applications.

Mac users often ask whether they should install "anti-virus" (AV) software. The usual answer is "no." That answer is right, but it may give the wrong impression that there is no threat from what are loosely called "viruses." There is a threat, and you need to educate yourself about it.
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 and gets onto a computer as an unintended consequence of the user's actions.
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 computer, or who has been able to take control of it remotely. That threat is in a different category, and there's no easy way to defend against it. AV software is not intended to, and does not, defend against such attacks.
The comment is long because the issue is complex. The key points are in 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. Internally Apple calls it "XProtect."
The malware recognition database used by XProtect is automatically updated; 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 been checked for security by Apple unless it comes from the App Store, 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.
Apple has taken far too long to revoke the codesigning certificates of some known abusers, thereby diluting the value of Gatekeeper and the Developer ID program. Those lapses don't involve App Store products, however.
For the reasons given, App Store products, and—to a lesser extent—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. Sandbox 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 are not, and never will be, complete protection. Malware is a problem of human behavior, not machine behavior, and no technological fix alone is going to solve it. Trusting software to protect you will only make you more vulnerable.
The best 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 Internet criminals. If you're better informed than they think you are, you'll win. That means, in practice, that you always stay within a safe harbor of computing practices. How do you know when you're leaving the safe harbor? Below are some warning signs of danger.
Software from an untrustworthy source
☞ Software with a corporate brand, such as Adobe Flash Player, doesn't come directly from the developer’s website. Do not trust an alert from any website to update Flash, or your browser, or any other software. A genuine alert that Flash is outdated and blocked is shown on this support page. Follow the instructions on the support page in that case. Otherwise, assume that the alert is fake and someone is trying to scam you into installing malware. If you see such alerts on more than one website, ask for instructions.
☞ Software of any kind is distributed via BitTorrent, or Usenet, or on a website that also distributes pirated music or movies.
☞ Rogue websites such as Softonic, Soft32, and CNET Download distribute free applications that have been packaged in a superfluous "installer."
☞ The software is advertised by means of spam or intrusive web ads. Any ad, on any site, that includes a direct link to a download should be ignored.
Software that is plainly illegal or does something illegal
☞ High-priced commercial software such as Photoshop is "cracked" or "free."
☞ An application helps you to infringe copyright, for instance by circumventing the copy protection on commercial software, or saving streamed media for reuse without permission. All "YouTube downloaders" are in this category, though not all are necessarily malicious.
Conditional or unsolicited offers from strangers
☞ A telephone caller or a web page tells you that you have a “virus” and offers to help you remove it. (Some reputable websites did legitimately warn visitors who were infected with the "DNSChanger" malware. That exception to this rule no longer applies.)
☞ A web site offers free content such as video or music, but to use it you must install a “codec,” “plug-in,” "player," "downloader," "extractor," or “certificate” that comes from that same site, or an unknown one.
☞ You win a prize in a contest you never entered.
☞ Someone on a message board such as this one is eager to help you, but only if you download an application of his choosing.
☞ A "FREE WI-FI !!!" network advertises itself in a public place such as an airport, but is not provided by the management.
☞ Anything online that you would expect to pay for is "free."
Unexpected events
☞ A file is downloaded automatically when you visit a web page, with no other action on your part. Delete any such file without opening it.
☞ You open what you think is a document and get an alert that it's "an application downloaded from the Internet." Click Cancel and delete the file. Even if you don't get the alert, you should still delete any file that isn't what you expected it to be.
☞ An application does something you don't expect, such as asking for permission to access your contacts, your location, or the Internet for no obvious reason.
☞ Software is attached to email that you didn't request, even if it comes (or seems to come) from someone you trust.
I don't say that leaving the safe harbor just once will necessarily result in disaster, but making a habit of it will weaken your defenses against malware attack. Any of the above scenarios should, at the very least, make you uncomfortable.
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 padlock icon in the address bar when visiting a secure site.
Stay within the safe harbor, 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.
7. Never install any commercial AV or "Internet security" products for the Mac, as they are all worse than useless. If you need to be able to detect Windows malware in your files, use one of the free security apps in the Mac App Store—nothing else.
Why shouldn't you use commercial AV products?
☞ To recognize malware, the software depends on a database of known threats, which is always at least a day out of date. This technique is a proven failure, as a major AV software vendor has admitted. Most attacks are "zero-day"—that is, previously unknown. Recognition-based AV does not defend against such attacks, and the enterprise IT industry is coming to the realization that traditional AV software is worthless.
☞ Its 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, commercial AV 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.
☞ By modifying the operating system, the software may also create weaknesses that could be exploited by malware attackers.
☞ Most importantly, a false sense of security is dangerous.
8. An AV product from the App Store, such as "ClamXav," has the same drawback as the commercial suites of being always out of date, but it does not inject low-level code into the operating system. That doesn't mean it's entirely harmless. 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 AV app is not needed, and cannot be relied upon, for protection against OS X malware. It's useful, if at all, only for detecting Windows malware, and even for that use it's not really effective, because new Windows malware is emerging much faster than OS X malware.
Windows malware can't harm you directly (unless, of course, you use Windows.) Just don't pass it on to anyone else. A malicious attachment in email is usually easy to recognize by the name alone. An actual example:
London Terror Moovie.avi [124 spaces] Checked By Norton Antivirus.exe
You don't need software to tell you that's a Windows trojan. Software may be able to tell you which trojan it is, but who cares? In practice, there's no reason to use recognition software unless an organizational policy requires it. Windows malware is so widespread that you should assume it's in every email attachment until proven otherwise. Nevertheless, ClamXav or a similar product from the App Store may serve a purpose if it satisfies an ill-informed network administrator who says you must run some kind of AV application. It's free and it won't handicap the system.
The ClamXav developer won't try to "upsell" you to a paid version of the product. Other developers may do that. Don't be upsold. For one thing, you should not pay to protect Windows users from the consequences of their choice of computing platform. For another, a paid upgrade from a free app will probably have all the disadvantages mentioned in section 7.
9. It seems to be a common belief that the built-in Application Firewall acts as a barrier to infection, or prevents malware from functioning. It does neither. It blocks inbound connections to certain network services you're running, such as file sharing. It's disabled by default and you should leave it that way if you're behind a router on a private home or office network. Activate it only when you're on an untrusted network, for instance a public Wi-Fi hotspot, where you don't want to provide services. Disable any services you don't use in the Sharing preference pane. All are disabled by default.
10. As a Mac user, you don't have to live in fear that your computer may be infected every time you install software, read email, or visit a web page. But neither can you assume that you will always be safe from exploitation, no matter what you do. Navigating the Internet is like walking the streets of a big city. It can be as safe or as dangerous as you choose to make it. The greatest harm done by security software is precisely its selling point: it makes people feel safe. They may then feel safe enough to take risks from which the software doesn't protect them. Nothing can lessen the need for safe computing practices.

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