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[Solved] Could not load tap.kext and naclient.pkg Script Error when Install SSLVPN Client on Mac OS High Sierra

Below error show when try to install SSLVPN client on Mac OS High Sierra due to Mac OS is not allowing the KEXT:

/opt/sslvpn-plus/naclient/signed_kext/tap.kext failed to load - (libkern/kext) system policy prevents loading; check the system/kernel logs for errors or try kextutil(8).
Error: Could not load /opt/sslvpn-plus/naclient/signed_kext/tap.kext

installer[4571] : install:didFailWithError:Error Domain=PKInstallErrorDomain Code=112 "An error occurred while running scripts from the package “naclient.pkg”." UserInfo={NSFilePath=./postinstall, NSURL=file:///naclient.pkg, PKInstallPackageIdentifier=com.vmware.sslvpn, NSLocalizedDescription=An error occurred while running scripts from the package “naclient.pkg”.}
installer[4571] : Install failed: The Installer encountered an error that caused the installation to fail. Contact the software manufacturer for assistance.
installer: The install failed (The Installer encountered an error that caused the installation to fail. Contact the software manufacturer for assistance.)

Workaround

Add tun tap team-id to pre-approved kext list.

Step 1: Uninstall any partially installed sslvpn-plus client.

Step 2: Boot Mac OS in recovery mode.

Step 3: On top bar click on utilities > terminal.

Step 4: Add tuntap kext team id to pre-approved list with the following command:

spctl kext-consent add KS8XL6T9FZ

Step 5: Reboot Mac OS to normal mode.

Step 6: Verify if Team-ID is seen in kext approved list with following command:

spctl kext-consent list

Step 7: Install SSLVPN Client package.

Reference

VMware Knowledge Base: Unable to install SSLVPN client on Mac OS High Sierra (59190)

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