Applications keep closing unexpectedly, virus?

First, I wouldn't recommend iAntiVirus. It ***** and not worth it. There are better ones out there that are not in the App store such as Avast. Second, to my knowledge Mac viruses does not cause applications to close but it will mostly cause performance issues or whatever it's programmed to do. Third, I would recommend you boot into recovery mode(CMD+R) use Disk Utility to verify your disk to make sure there are no issues with the file structure of your hard drive, then verify and repair any permission errors. Also, if you can boot up and log in normally, check to see what applicaionts or other items are loading. Go to System Preferences-->Users&Groups-->select your user account. On the right select Login Items and remove what you don't need to load automatically.

You can also check this site for tips. https://discussions.apple.com/docs/DOC-3353

Macs don't get viruses. You can get Malware but you have to download and install it with your Macs administrator approval. So AV software is not needed and often causes more problems then it creates...especially Norton products for Mac. Very well known to cause big problems. Please uninstall it using Norton's uninstaller.

Can you tell us how much RAM (Memory) you have? It's listed by clicking on the  in your title bar....go to About This Mac and it's in the 1st window.

We would also like to know what size hard drive you have and how much free space is on it.

If you click on your Hard drive icon (should be upper right hand corner of your screen), or the Finder in your Dock...when the window opens it says at the bottom how much Free Space you have on your drive.

If you go to the , click on About This Mac, click on More Info... in that window. The next window says how big your hard drive is under Hardware....click on Serial-ATA.....look under Capacity:

We need to know this cause if a hard drive is too full it slows things down and creates operational difficulties.

DALE

You do not have a virus, and you should remove iAntivirus, it may be the reason your Apps close unexpectedly. Remove all A/V software per the developers instructions.

JShimazaki wrote:

First, I wouldn't recommend iAntiVirus. It ***** and not worth it. There are better ones out there that are not in the App store such as Avast. Second, to my knowledge Mac viruses does not cause applications to close but it will mostly cause performance issues or whatever it's programmed to do. Third, I would recommend you boot into recovery mode(CMD+R) use Disk Utility to verify your disk to make sure there are no issues with the file structure of your hard drive, then verify and repair any permission errors. Also, if you can boot up and log in normally, check to see what applicaionts or other items are loading. Go to System Preferences-->Users&Groups-->select your user account. On the right select Login Items and remove what you don't need to load automatically.

You can also check this site for tips. https://discussions.apple.com/docs/DOC-3353

There are no Mac viruses.

Multiple comments here...

First, regarding iAntivirus, note that it doesn't do a very good job of detecting malware. (See Mac anti-virus detection rates.) However, it also won't cause any of the problems you're experiencing. Since it comes from the App Store, sandboxing limitations will prevent it from installing or doing anything that will cause system-wide instability.

As to Avast, note that it does better than iAntivirus, but is far from the best anti-virus software available for Macs, and it has a history of lots of false positives. I would recommend choosing Sophos above all other anti-virus options, if you want to have anti-virus software.

You mention a plug-in for a game... you cannot rule out that it is malicious or just plain lousy just because of reviews, though. They could be fake or paid-for with perks like free upgrades. What plug-in and what game?

As to generalized advice for curing your problems, see my Mac Performance Guide. Most of the fixes described there also apply to issues beyond simple performance issues.

Which applications are crashing?

Launch the Console application in any of the following ways:

☞ Enter the first few letters of its name into a Spotlight search. Select it in the results (it should be at the top.)

☞ In the Finder, select Go ▹ Utilities from the menu bar, or press the key combination shift-command-U. The application is in the folder that opens.

☞ Open LaunchPad. Click Utilities, then Console in the icon grid.

Step 1

Make sure the title of the Console window is All Messages. If it isn't, select All Messages from the SYSTEM LOG QUERIES menu on the left.

When posting a log extract, be selective. In most cases, a few dozen lines are more than enough.

Please do not indiscriminately dump thousands of lines from the log into a message.

Important: Some private information, such as your name, may appear in the log. Edit it out by search-and-replace in a text editor before posting.

Step 2

Still in the Console window, look under User Diagnostic Reports for crash reports related to the process. The report name starts with the name of the crashed process, and ends with ".crash". Select the most recent report and post the entire contents — again, the text, not a screenshot. In the interest of privacy, I suggest that, before posting, you edit out the “Anonymous UUID,” a long string of letters, numbers, and dashes in the header of the report, if it’s present (it may not be.) Please don’t post shutdownStall, spin, or hang logs — they're very long and not helpful.

Hello,

I'm having a similar (or the same) problem. An application (BetterTouchTool) is shutting down at random intervals of time, ranging from a few minutes to ten or more. I don't get a notification message or any popups, the icon in my menubar just disappears and the program's functions stop working.

I checked the Colsole error logs, and couldn't find anything definitive, but I'm not familiar with what any of the logs mean. I really hope you can help me figure this out so I don't need to take it in.

This same list of entries seems to be generated whenever the app closes it and I have to re-open it:

12/5/14 12:04:32.503 PM com.apple.xpc.launchd[1]: (com.hegenberg.BetterTouchTool.73588[2189]) Service exited due to signal: Terminated: 15

12/5/14 12:05:13.457 PM BetterTouchTool[2233]: init

12/5/14 12:05:13.925 PM BetterTouchTool[2233]: WARNING: The Gestalt selector gestaltSystemVersion is returning 10.9.1 instead of 10.10.1. Use NSProcessInfo's operatingSystemVersion property to get correct system version number.

Call location:

12/5/14 12:05:13.925 PM BetterTouchTool[2233]: 0 CarbonCore 0x00007fff90be1dc3 ___Gestalt_SystemVersion_block_invoke + 113

12/5/14 12:05:13.925 PM BetterTouchTool[2233]: 1 libdispatch.dylib 0x00007fff8cbbdc13 _dispatch_client_callout + 8

12/5/14 12:05:13.925 PM BetterTouchTool[2233]: 2 libdispatch.dylib 0x00007fff8cbbdb26 dispatch_once_f + 117

12/5/14 12:05:13.925 PM BetterTouchTool[2233]: 3 CarbonCore 0x00007fff90b8a4da _Gestalt_SystemVersion + 987

12/5/14 12:05:13.925 PM BetterTouchTool[2233]: 4 CarbonCore 0x00007fff90b8a0c7 Gestalt + 144

12/5/14 12:05:13.925 PM BetterTouchTool[2233]: 5 FeedbackReporter 0x000000010f20820f +[FRCrashLogFinder getSystemVersionMajor:minor:bugFix:] + 47

12/5/14 12:05:13.926 PM BetterTouchTool[2233]: 6 FeedbackReporter 0x000000010f20866c +[FRCrashLogFinder findCrashLogsSince:] + 76

12/5/14 12:06:57.942 PM com.apple.xpc.launchd[1]: (com.hegenberg.BetterTouchTool.73588[2233]) Service exited due to signal: Terminated: 15

Thank you for any help you can give!

-Gabriel