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Installer error: chmod/chown on a non-existing kext

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Hi,

Lately I use to get installer errors while updating as you can see below (on macOS 10.14.5.) Still, everything seems to work fine, except one weird thing: I'm missing the kext in /Library/Extensions (and the installer complains about it as you can see below.)

locate MB_ retrieves this (is this a high-sophisticated-encrypted-patent-pending-evil-villian-defence-tactic or just a typo? :-)
/Library/Application Support/Malwarebytes/MBAM/Kext/MB_MBAM_Protection.txek

History:

I upgraded from Sierra to Mojave last year, so I had no problems with authorizing. I allowed full disk access to RT daemon and all worked well. Then somewhere in time I got problems while updating and recognized the errors.

Cheers,
ALN

File content of install.log:

2019-05-14 20:14:24+02 <REDACTED> installd[552]: PackageKit: ----- Begin install -----
2019-05-14 20:14:24+02 <REDACTED> installd[552]: PackageKit: request=PKInstallRequest <1 packages, destination=/>
2019-05-14 20:14:24+02 <REDACTED> installd[552]: PackageKit: packages=(
        "PKLeopardPackage <id=com.malwarebytes.mbam.installer, version=1.0, url=file:///tmp/42D2E5E8-2A5C-4B1F-B3CF-5F4ADB8532A0.pkg#MBAM.pkg>"
    )
2019-05-14 20:14:24+02 <REDACTED> installd[552]: PackageKit: Set reponsibility for install to 71
2019-05-14 20:14:25+02 <REDACTED> installd[552]: PackageKit: Extracting file:///tmp/42D2E5E8-2A5C-4B1F-B3CF-5F4ADB8532A0.pkg#MBAM.pkg (destination=/var/folders/zz/zyxvpxvq6csfxvn_n0000000000000/C/PKInstallSandboxManager/A598993A-C111-4EF9-A749-84CFECA0A739.activeSandbox/Root, uid=0)
2019-05-14 20:14:25+02 <REDACTED> installd[552]: PackageKit: prevent user idle system sleep
2019-05-14 20:14:25+02 <REDACTED> installd[552]: PackageKit: suspending backupd
2019-05-14 20:14:26+02 <REDACTED> installd[552]: PackageKit: Executing script "./preinstall" in /private/tmp/PKInstallSandbox.GPcuQK/Scripts/com.malwarebytes.mbam.installer.0hah7U
2019-05-14 20:14:26+02 <REDACTED> install_monitor[42283]: Temporarily excluding: /Applications, /Library, /System, /bin, /private, /sbin, /usr
2019-05-14 20:14:26+02 <REDACTED> installd[552]: ./preinstall: Current user: root (0)
2019-05-14 20:14:27+02 <REDACTED> installd[552]: ./preinstall: Killing 'FrontendApplication' main UI if it's running...
2019-05-14 20:14:27+02 <REDACTED> installd[552]: ./preinstall: Killing 'Malwarebytes' launcher if it's running...
2019-05-14 20:14:27+02 <REDACTED> installd[552]: ./preinstall: No matching processes were found
2019-05-14 20:14:27+02 <REDACTED> installd[552]: ./preinstall: Agent unload for All active users from '/Library/LaunchAgents/com.malwarebytes.mbam.frontend.agent.plist'...
2019-05-14 20:14:27+02 <REDACTED> installd[552]: ./preinstall:   Using new launchctl interface:
2019-05-14 20:14:27+02 <REDACTED> installd[552]: ./preinstall:     UID: 501
2019-05-14 20:14:28+02 <REDACTED> installd[552]: ./preinstall: Agent unloading has been finished.
2019-05-14 20:14:28+02 <REDACTED> installd[552]: ./preinstall: Stopping 'com.malwarebytes.mbam.rtprotection.daemon' RTP daemon...
2019-05-14 20:14:29+02 <REDACTED> installd[552]: ./preinstall: kextstat result ''
2019-05-14 20:14:29+02 <REDACTED> installd[552]: ./preinstall: FSO driver 'com.malwarebytes.mbam.rtprotection' is not loaded.
2019-05-14 20:14:29+02 <REDACTED> installd[552]: ./preinstall: Stopping 'com.malwarebytes.mbam.settings.daemon' SK daemon...
2019-05-14 20:14:29+02 <REDACTED> installd[552]: PackageKit: Removing client PKInstallDaemonClient pid=42223, uid=0 (/usr/sbin/installer)
2019-05-14 20:14:29+02 <REDACTED> installd[552]: ./preinstall: Removing files...
2019-05-14 20:14:31+02 <REDACTED> installd[552]: ./preinstall: chown: /Library/Extensions/MB_MBAM_Protection.kext: No such file or directory
2019-05-14 20:14:31+02 <REDACTED> installd[552]: ./preinstall: chmod: /Library/Extensions/MB_MBAM_Protection.kext: No such file or directory
2019-05-14 20:14:31+02 <REDACTED> installd[552]: ./preinstall: chown: /Library/Extensions/com.malwarebytes.mbam.rtprotection.kext: No such file or directory
2019-05-14 20:14:31+02 <REDACTED> installd[552]: ./preinstall: chmod: /Library/Extensions/com.malwarebytes.mbam.rtprotection.kext: No such file or directory
2019-05-14 20:14:32+02 <REDACTED> installd[552]: PackageKit: Using trashcan path /var/folders/zz/zyxvpxvq6csfxvn_n0000000000000/T/PKInstallSandboxTrash/A598993A-C111-4EF9-A749-84CFECA0A739.sandboxTrash for sandbox /var/folders/zz/zyxvpxvq6csfxvn_n0000000000000/C/PKInstallSandboxManager/A598993A-C111-4EF9-A749-84CFECA0A739.activeSandbox
2019-05-14 20:14:32+02 <REDACTED> installd[552]: PackageKit: Shoving /var/folders/zz/zyxvpxvq6csfxvn_n0000000000000/C/PKInstallSandboxManager/A598993A-C111-4EF9-A749-84CFECA0A739.activeSandbox/Root (2 items) to /
2019-05-14 20:14:33+02 <REDACTED> softwareupdated[274]: Event handler called with flags: 103
2019-05-14 20:14:33+02 <REDACTED> installd[552]: PackageKit: Executing script "./postinstall" in /private/tmp/PKInstallSandbox.GPcuQK/Scripts/com.malwarebytes.mbam.installer.0hah7U
2019-05-14 20:14:34+02 <REDACTED> installd[552]: ./postinstall: Current user: root (0)
2019-05-14 20:14:34+02 <REDACTED> installd[552]: ./postinstall: Installer path: /tmp/42D2E5E8-2A5C-4B1F-B3CF-5F4ADB8532A0.pkg.
2019-05-14 20:14:34+02 <REDACTED> installd[552]: ./postinstall: Installer filename: 42D2E5E8-2A5C-4B1F-B3CF-5F4ADB8532A0.pkg.
2019-05-14 20:14:34+02 <REDACTED> installd[552]: ./postinstall: Adding parameters to the protection daemon plist.
2019-05-14 20:14:35+02 <REDACTED> installd[552]: ./postinstall: Launching components on OSX v10.14.5...
2019-05-14 20:14:35+02 <REDACTED> installd[552]: ./postinstall: Loading 'com.malwarebytes.mbam.settings.daemon' SK daemon...
2019-05-14 20:14:35+02 <REDACTED> installd[552]: ./postinstall: Loading 'com.malwarebytes.mbam.rtprotection.daemon' RTP daemon...
2019-05-14 20:14:37+02 <REDACTED> installd[552]: ./postinstall: Agent loading for All active users from '/Library/LaunchAgents/com.malwarebytes.mbam.frontend.agent.plist'...
2019-05-14 20:14:37+02 <REDACTED> installd[552]: ./postinstall:   Using new launchctl interface:
2019-05-14 20:14:37+02 <REDACTED> installd[552]: ./postinstall:     UID: 501
2019-05-14 20:14:41+02 <REDACTED> installd[552]: ./postinstall: LSOpenURLsWithRole() failed with error -10810 for the file /Library/Application Support/Malwarebytes/MBAM/Engine.bundle/Contents/PlugIns/FrontendApplication.app.
2019-05-14 20:14:42+02 <REDACTED> install_monitor[42283]: Re-included: /Applications, /Library, /System, /bin, /private, /sbin, /usr
2019-05-14 20:14:43+02 <REDACTED> installd[552]: PackageKit: releasing backupd
2019-05-14 20:14:43+02 <REDACTED> installd[552]: PackageKit: allow user idle system sleep
2019-05-14 20:14:43+02 <REDACTED> installd[552]: PackageKit: Failed to get responsibility for client 42223. Will skip Installer.app check.
2019-05-14 20:14:43+02 <REDACTED> installd[552]: PackageKit: Install Failed: Error Domain=PKInstallErrorDomain Code=112

 

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I would not try to interpret the output of the installer logs, as there are messages specifically for the developers there, for troubleshooting purposes. I also wouldn't expect to find the kernel extension in /Library/Extensions/, as it's not put there anymore.

Are you having a problem with getting real-time protection working, or is it all working just fine? (Sounds like the latter.)

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