How can i solve invalid signature & failed messages? ex: com.apple.MRTa.plist - Invalid signature!

Question

EtreCheck version: 2.6.3 (223)Report generated 21/11/15 09:50Runtime 1:22Download EtreCheck from http://etresoft.com/etrecheckClick the [Click for support] links for help with non-Apple products.Click the [Click for details] links for more information about that line.Hardware Information: (What does this mean?)    MacBook Pro (Retina, 15-inch, Mid 2014)    [Click for Technical Specifications]    [Click for User Guide]    MacBook Pro - model: MacBookPro11,2    1 2,2 GHz Intel Core i7 CPU: 4-core    16 GB RAM Not upgradeable            BANK 0/DIMM0            8 GB DDR3 1600 MHz ok        BANK 1/DIMM0            8 GB DDR3 1600 MHz ok    Bluetooth: Good - Handoff/Airdrop2 supported    Wireless:  en0: 802.11 a/b/g/n/ac    Battery: Health &#x3D; Normal - Cycle count &#x3D; 90 - SN &#x3D; D864513Y3G6F9CPACVideo Information: (What does this mean?)    Intel Iris Pro        Color LCD 2880 x 1800System Software: (What does this mean?)    OS X El Capitan 10.11.1 (15B42) - Time since boot: less than an hourDisk Information: (What does this mean?)    APPLE SSD SM0256F disk0 : (251 GB) (Solid State - TRIM: Yes)        EFI (disk0s1) &lt;not mounted&gt; : 210 MB        Recovery HD (disk0s3) &lt;not mounted&gt;  [Recovery]: 650 MB        Macintosh HD (disk1) / : 249.80 GB (110.22 GB free)            Core Storage: disk0s2 250.14 GB OnlineUSB Information: (What does this mean?)    Apple Inc. Apple Internal Keyboard / Trackpad    Apple Inc. BRCM20702 Hub        Apple Inc. Bluetooth USB Host ControllerThunderbolt Information: (What does this mean?)    Apple Inc. thunderbolt_busConfiguration files: (What does this mean?)    /etc/hosts - Count: 2Gatekeeper: (What does this mean?)    AnywhereKernel Extensions: (What does this mean?)        /Applications/WD Hard Disk/Extras/WD +TURBO Installer.app    [not loaded]    com.wdc.driver.1394.64.10.9 (1.0.1 - SDK 10.9) [Click for support]    [not loaded]    com.wdc.driver.1394HP (1.0.11 - SDK 10.4) [Click for support]    [not loaded]    com.wdc.driver.1394_64HP (1.0.1 - SDK 10.6) [Click for support]    [not loaded]    com.wdc.driver.USB-64HP (1.0.3) [Click for support]    [not loaded]    com.wdc.driver.USB.64.10.9 (1.0.1 - SDK 10.9) [Click for support]    [not loaded]    com.wdc.driver.USBHP (1.0.14) [Click for support]        /Library/Extensions    [not loaded]    com.caiaq.driver.NIUSBAudio2DJDriver (2.7.0 - SDK 10.9) [Click for support]    [not loaded]    com.caiaq.driver.NIUSBAudio4DJDriver (2.7.0 - SDK 10.9) [Click for support]    [not loaded]    com.caiaq.driver.NIUSBHardwareDriver (2.7.0 - SDK 10.9) [Click for support]    [not loaded]    com.caiaq.driver.NIUSBTraktorAudio2Driver (2.7.0 - SDK 10.9) [Click for support]    [not loaded]    com.caiaq.driver.NIUSBTraktorKontrolS4Driver (2.7.0 - SDK 10.9) [Click for support]    [not loaded]    com.caiaq.driver.NIUSBTraktorKontrolX1Driver (2.7.0 - SDK 10.9) [Click for support]        /System/Library/Extensions    [not loaded]    com.devguru.driver.SamsungComposite (1.4.31 - SDK 10.6) [Click for support]        /System/Library/Extensions/ssuddrv.kext/Contents/PlugIns    [not loaded]    com.devguru.driver.SamsungACMControl (1.4.31 - SDK 10.6) [Click for support]    [not loaded]    com.devguru.driver.SamsungACMData (1.4.31 - SDK 10.6) [Click for support]    [not loaded]    com.devguru.driver.SamsungMTP (1.4.31 - SDK 10.5) [Click for support]    [not loaded]    com.devguru.driver.SamsungSerial (1.4.31 - SDK 10.6) [Click for support]System Launch Agents: (What does this mean?)    [loaded]    com.apple.MRTa.plist - Invalid signature!    [loaded]    com.apple.java.InstallOnDemand.plist - Invalid signature!System Launch Daemons: (What does this mean?)    [loaded]    com.apple.MRTd.plist - Invalid signature!Launch Agents: (What does this mean?)    [loaded]    com.adobe.AAM.Updater-1.0.plist [Click for support]    [loaded]    com.adobe.AdobeCreativeCloud.plist [Click for support]    [loaded]    com.google.keystone.agent.plist [Click for support]    [loaded]    com.intego.backupassistant.agent.plist [Click for support]    [loaded]    com.oracle.java.Java-Updater.plist [Click for support]Launch Daemons: (What does this mean?)    [loaded]    com.acronis.update.plist [Click for support]    [loaded]    com.adobe.SwitchBoard.plist [Click for support]    [running]    com.adobe.adobeupdatedaemon.plist [Click for support]    [loaded]    com.adobe.agsservice.plist [Click for support]    [loaded]    com.adobe.fpsaud.plist [Click for support]    [loaded]    com.google.keystone.daemon.plist [Click for support]    [running]    com.intego.BackupAssistant.daemon.plist [Click for support]    [loaded]    com.microsoft.office.licensing.helper.plist [Click for support]    [loaded]    com.oracle.java.Helper-Tool.plist [Click for support]User Launch Agents: (What does this mean?)    [failed]    com.acronis.monitor.plist [Click for support] [Click for details]    [loaded]    com.adobe.AAM.Updater-1.0.plist [Click for support]    [loaded]    com.adobe.ARM.[...].plist [Click for support]    [loaded]    com.adobe.ARM.[...].plist [Click for support]    [loaded]    com.bittorrent.uTorrent.plist [Click for support]User Login Items: (What does this mean?)    Moveslink2    Application  (/Applications/Moveslink2.app)    iTunesHelper    Application  (/Applications/iTunes.app/Contents/MacOS/iTunesHelper.app)    WDDriveUtilityHelper    Application  (/Applications/WD Hard Disk/WD Drive Utilities.app/Contents/WDDriveUtilityHelper.app)    NIHardwareAgent    Application Hidden (/Library/Application Support/Native Instruments/Hardware/NIHardwareAgent.app)    Viber    Application  (/Applications/Viber.app)    CrossOver CD Helper    Application  (/Applications/CrossOver.app/Contents/Resources/CrossOver CD Helper.app)    SpeechSynthesisServer    Application  (/System/Library/Frameworks/ApplicationServices.framework/Versions/A/Frameworks /SpeechSynthesis.framework/Versions/A/SpeechSynthesisServer.app)    KiesAgent    Application Hidden (/Applications/Samsung/Kies.app/Contents/MacOS/KiesAgent.app)    fuspredownloader    Application Hidden (~/Library/Application Support/.FUS/fuspredownloader.app)Other Apps: (What does this mean?)    [running]    OpenObject.fuspredownloader.134752    [running]    Suunto.Moveslink2.84512    [running]    com.adobe.acc.AdobeDesktopService.299872.08745B9C-0AE9-40D8-93C9-8DC146B22C01    [running]    com.adobe.accmac.298912    [running]    com.codeweavers.CrossOverCDHelper.135712    [running]    com.etresoft.EtreCheck.1320992    [running]    com.hp.devicemonitor    [running]    com.native-instruments.NIHardwareService.132832    [running]    com.westerndigital.WDDriveUtilityHelper.135392    [running]    com.yourcompany.KiesAgent.134432Internet Plug-ins: (What does this mean?)    Default Browser: Version: 601 - SDK 10.11    AdobeExManDetect: Version: AdobeExManDetect 1.1.0.0 - SDK 10.7 [Click for support]    AdobeAAMDetect: Version: 3.0.0.0 - SDK 10.9 [Click for support]    AdobePDFViewerNPAPI: Version: 11.0.13 - SDK 10.6 [Click for support]    FlashPlayer-10.6: Version: 19.0.0.245 - SDK 10.6 [Click for support]    QuickTime Plugin: Version: 7.7.3    Flash Player: Version: 19.0.0.245 - SDK 10.6 [Click for support]    PepperFlashPlayer: Version: 19.0.0.245 - SDK 10.6 [Click for support]    SharePointBrowserPlugin: Version: 14.5.8 - SDK 10.6 [Click for support]    AdobePDFViewer: Version: 11.0.13 - SDK 10.6 [Click for support]    EPPEX Plugin: Version: 10.0 [Click for support]    JavaAppletPlugin: Version: Java 8 Update 66 build 17 Check versionUser internet Plug-ins: (What does this mean?)    Picasa: Version: 1.0 - SDK 10.6 [Click for support]    Google Earth Web Plug-in: Version: 7.1 [Click for support]Safari Extensions: (What does this mean?)    AdBlock3rd Party Preference Panes: (What does this mean?)    Flash Player  [Click for support]    Java  [Click for support]    Native Instruments USB Audio  [Click for support]    Paragon NTFS for Mac ® OS X  [Click for support]    GRproofing  [Click for support]Time Machine: (What does this mean?)    Skip System Files: NO    Auto backup: YES    Volumes being backed up:        Macintosh HD: Disk size: 249.80 GB Disk used: 139.57 GB    Destinations:        Time Machine TGT [Local]        Total size: 499.95 GB        Total number of backups: 15        Oldest backup: 04/04/15 21:26        Last backup: 01/11/15 17:45        Size of backup disk: Adequate            Backup size 499.95 GB &gt; (Disk used 139.57 GB X 3)Top Processes by CPU: (What does this mean?)         5%    WindowServer         4%    mds         4%    Moveslink2         2%    hidd         1%    fontdTop Processes by Memory: (What does this mean?)    1.05 GB    kernel_task    229 MB    ocspd    147 MB    mds_stores    98 MB    Dock    98 MB    WindowServerVirtual Memory Information: (What does this mean?)    12.00 GB    Free RAM    4.21 GB    Used RAM (1.13 GB Cached)    0 B    Swap UsedDiagnostics Information: (What does this mean?)    Nov 21, 2015, 09:47:14 AM    Self test - passed    Nov 20, 2015, 04:26:27 PM    ~/Library/Logs/DiagnosticReports/DictationIM_2015-11-20-162627_[redacted].crash    Nov 20, 2015, 04:19:28 PM    ~/Library/Logs/DiagnosticReports/gamed_2015-11-20-161928_[redacted].crash    Nov 20, 2015, 04:13:32 PM    /Library/Logs/DiagnosticReports/Viber_2015-11-20-161332_[redacted].hang    Nov 20, 2015, 02:25:14 PM    ~/Library/Logs/DiagnosticReports/Moveslink2_2015-11-20-142514_[redacted].crash    Nov 20, 2015, 01:38:35 PM    ~/Library/Logs/DiagnosticReports/gamed_2015-11-20-133835_[redacted].crash    Nov 20, 2015, 01:37:02 PM    ~/Library/Logs/DiagnosticReports/gamed_2015-11-20-133702_[redacted].crash    Nov 20, 2015, 11:27:54 AM    ~/Library/Logs/DiagnosticReports/gamed_2015-11-20-112754_[redacted].crash    Nov 20, 2015, 11:27:46 AM    ~/Library/Logs/DiagnosticReports/gamed_2015-11-20-112746_[redacted].crash    Nov 20, 2015, 11:19:22 AM    ~/Library/Logs/DiagnosticReports/gamed_2015-11-20-111922_[redacted].crash    Nov 20, 2015, 11:19:15 AM    ~/Library/Logs/DiagnosticReports/gamed_2015-11-20-111915_[redacted].crash    Nov 20, 2015, 11:14:58 AM    ~/Library/Logs/DiagnosticReports/gamed_2015-11-20-111458_[redacted].crash    Nov 20, 2015, 11:14:50 AM    ~/Library/Logs/DiagnosticReports/gamed_2015-11-20-111450_[redacted].crash    Nov 20, 2015, 02:06:55 AM    /Library/Logs/DiagnosticReports/firefox_2015-11-20-020655_[redacted].cpu_resour ce.diag [Click for details]

Linc Davis · Answer

You can solve that pseudo-problem by getting rid of "etrecheck" and ignoring its time-wasting, nonsensical output. Then, if you have a real problem, please describe it.

tgt28 · Answer

Thank you. Since I am a novice MacBook user (after 20 years Windows laptops user) your answer helped me.

tgt28 · Answer

Thank you. Since I am a novice MacBook user (after 20 years Windows laptops user) your answer helped me.

Linc Davis · Answer

The most important skill that any Mac user needs to learn is not to install useless or harmful software.How to maintain a MacMake two or more backups of all your filesOne backup is not enough to be safe. A copy of a backup doesn&#x27;t count as another backup; all backups must be made directly from the original data.Keep at least one backup off site at all times in case of disaster. Backing up to a cloud-data service is one way to meet this need, but don&#x27;t rely exclusively on such backups.In fact, don’t rely on any single backup method, such as Time Machine.If you get an indication that a backup has failed, don&#x27;t ignore it.Keep your software up to dateIn the App Store or Software Update preference pane (depending on the OS version), you can configure automatic notifications of updates to OS X and other Mac App Store products. Some third-party applications from other sources have a similar feature, if you don’t mind letting them phone home. Otherwise you have to check yourself on a regular basis.Keeping up to date is especially important for complex software that modifies the operating system, such as device drivers. Don&#x27;t install such modifications unless they&#x27;re absolutely necessary. Remove them when they are no longer needed. Before installing any Apple update, you must check that all system modifications that you use are compatible. Incompatibility with third-party software is by far the most common cause of difficulties with system updates.Don&#x27;t install crapware...such as “themes,” "haxies," “add-ons,” “toolbars,” “enhancers," “optimizers,” “accelerators,” "boosters," “extenders,” “cleaners,” "doctors," "tune-ups," “defragmenters,” “firewalls,” "barriers," “guardians,” “defenders,” “protectors,” most “plugins,” "virus scanners,” "disk tools," or "utilities." With very few exceptions, such stuff is useless or worse than useless. Above all, avoid any software that purports to change the look and feel of the user interface.It&#x27;s not much of an exaggeration to say that the whole "utility" software industry for the Mac is a fraud on consumers. The most extreme examples are the "CleanMyMac," "TuneUpMyMac," and “MacKeeper” scams, but there are many others.As a rule, you should avoid software that changes the way other software works. Plugins for Photoshop and similar programs are an obvious exception to this rule. The Mac App Store has extensions for the Photos app, and perhaps others, that should be safe. Safari extensions, and perhaps the equivalent for other web browsers, are a partial exception. Most are safe, and they&#x27;re easy to get rid of if they don&#x27;t work. Some may cause the browser to crash or otherwise malfunction. Some are malicious. Use with caution, and install only well-known extensions from relatively trustworthy sources, such as the Safari Extensions Gallery.Only install software that is useful to you, not (as you imagine) to the computer. For example, a word processor is useful for writing. A video editor is useful for making movies. A game is useful for fun. But a "cache cleaner" isn&#x27;t useful for anything. You didn&#x27;t buy a computer so you could clean caches.Never install any third-party software unless you know how to uninstall it. Otherwise you may create problems that are very hard to solve. Do not rely on "utilities" such as "AppCleaner" and the like that purport to remove software.Don&#x27;t install bad, conflicting, or unnecessary fontsWhenever you install new fonts, use the validation feature of the built-in Font Book application to make sure the fonts aren&#x27;t defective and don&#x27;t conflict with each other or with others that you already have. See the built-in help and this support article for instructions.Deactivate or remove fonts that you don&#x27;t really need to speed up application launching.Avoid malware"Malware" is malicious software that circulates on the Internet. This kind of attack on OS X was once so rare that it was hardly a concern, but it&#x27;s now increasingly common and dangerous.There is some built-in protection against malware, but you can’t rely on it—the attackers are always at least one day ahead of the defense. You can’t rely on third-party "anti-virus" or "anti-malware" products for protection either. What you can rely on is common-sense awareness—not paranoia, which only makes you more vulnerable.Never install software from an untrustworthy or unknown source. If in doubt, do some research. Any website that prompts you to install a “codec” or “plugin” that comes from the same site, or an unknown site, is untrustworthy. Software that doesn&#x27;t come from the Mac App Store, such as Adobe Flash Player, must come directly from the developer&#x27;s website. No intermediary is acceptable, and don’t trust links unless you know how to parse them. Any file that is automatically downloaded from the web, without your having requested it, should go straight into the Trash. A web page that tells you that your computer has a “virus,” or that anything else is wrong with it, is a scam.In OS X 10.7.5 or later, downloaded applications and Installer packages that have not been digitally signed by a developer registered with Apple are blocked from loading by default. The block can be overridden, but think carefully before you do so.Because of recurring security issues in Java, it’s best to disable it in your web browsers, if it’s installed. Few websites have Java content nowadays, so you won’t be missing much. This action is mandatory if you’re running any version of OS X older than 10.6.8 with the latest Java update. Note: Java has nothing to do with JavaScript, despite the similar names. Don&#x27;t install Java unless you&#x27;re sure you need it. Most people don&#x27;t.Don&#x27;t fill up your disk or SSDA common mistake is adding more and more large files to your home folder until you start to get warnings that you&#x27;re out of space, which may be followed in short order by a startup failure. This is more prone to happen on the newer Macs that come with an internal SSD instead of the traditional hard drive. The drive can be very nearly full before you become aware of the problem.While it&#x27;s not true that you should or must keep any particular percentage of space free, you should monitor your storage use and make sure you&#x27;re not in immediate danger of using it up. According to Apple documentation, you need at least 9 GB of free space on the startup volume for normal operation.If storage space is running low, use a tool such as OmniDiskSweeperto explore the volume and find out what&#x27;s taking up the most space. Move seldom-used large files to secondary storage.Relax, don’t do itBesides the above, no routine maintenance is necessary or beneficial for the vast majority of users; specifically not “cleaning caches,” “zapping the PRAM,” "resetting the SMC," “rebuilding the directory,” "defragmenting the drive," “running periodic scripts,” “dumping logs,” "deleting temp files," “scanning for viruses,” "purging memory," "checking for bad blocks," "testing the hardware," or “repairing permissions.” Such measures are either completely pointless or are useful only for solving problems, not for prevention. Permission repair is not even possible in OS X 10.11 ("El Capitan") or later.To use a Mac effectively, you have to free yourself from the Windows mindset that every computer needs regular downtime for maintenance such as "defragging" and "registry cleaning." Those concepts do not apply to the Mac platform.A well-designed computing device is not something you should have to think about much. It should be an almost transparent medium through which you communicate, work, and play. If you want a machine that needs a lot of attention just to keep going, use a PC, or collect antique cars.The very height of futility is running an expensive third-party application called “Disk Warrior” when nothing is wrong, or even when something is wrong and you have backups, which you must have. Disk Warrior is a data-salvage tool, not a maintenance tool, and you will never need it if your backups are adequate. Don’t waste money on it or anything like it.

etresoft · Answer

Hello tgt28,Unfortunately, there is no way to solve these invalid signatures. They appear to be the result of Apple&#x27;s automatic update mechanism for some system files. This update mechanism breaks the digital signature on, of all things, Apple&#x27;s own Malware Removal Tool. I have filed a bug report with Apple and I will release an update to EtreCheck this weekend that will add these two "MRT" entries to EtreCheck&#x27;s list of known Apple failures. The signatures will always be invalid until Apple comes up with a better way to manage these updates.

tgt28 · Answer

Thanks again!!!!!