macOS High Sierra 10.13 introduced a new security feature that requires manual user approval before loading new third-party kernel extensions.
Question: Q: System Extension Gets Blocked But There Is No Allow Button In System Settings I installed BlueStacks into my computer and opened it. When it asked me to allow an extension it needed in order for it to be used, I went to system preferences to allow the extension but it wasn't there. Free download latest version of BlueStacks 4. But, the website that the user attempts to visit would still be blocked BlueStacks requires permissionto run on your Mac. Physical access to the client machine is required—when accessing remotely, the Allow button is disabled. Bluestacks mac system extension blocked. About Press Copyright Contact us Creators Advertise Developers Terms Privacy Policy & Safety How YouTube works Test new features Press Copyright Contact us Creators. If You think I did a great jobThankyou 💕With every new Apple OS comes new features and new challenges. MacOS High Sierra has improved security features that.
User Approved Kernel Extension Loading
To improve security on the Mac, kernel extensions installed with or after the installation of macOS High Sierra require user consent in order to load. This is known as User Approved Kernel Extension Loading. Any user can approve a kernel extension, even if they don’t have administrator privileges.
A walk-through of the user approval process
When a user installs an application on a Mac (either from a local source or via Managed Software Center) which loads a third-party extension, the load request is denied and macOS presents the alert shown in Figure 1.
Figure 1 — The 'System Extension Blocked' dialog which you would see if you have installed the GlobalProtect VPN application for the first time.
Bluestacks Not Launching Mac
Click on the button labeled 'Open Security Preferences', which will take you to the Security & Privacy panel of Systems Preferences (as shown in Figure 2).
NOTE: If you click the 'OK' button instead, you have 30 minutes in which to navigate to the Security & Privacy System Preference before the Allow button disappears. You would then need to restart the Mac in order to approve the system extension(s).
Figure 2— User approval to load the third-party extension. In this example, selecting 'Allow' will enable loading of kernel extensions from Palo Alto Networks, developers of the GlobalProtect VPN client.
Click on the 'Allow' button to enable the kernel extension to load so that this application (and any other applications by the same developer) will function properly on the Mac. You will be prompted if a restart is required at this time.
Which applications require user approval?
Below is a short list of the third-party applications you would be most likely to encounter at WCER which may require manual approval:
• Box Drive (cloud storage and collaboration application)
• Cisco System's AMP for Endpoints Connector (antivirus and malware protection)
• Palo Alto Networks GlobalProtect (VPN client)
• VMWare Fusion (virtual machine application)
PLEASE NOTE:If any of these applications were already installed when you received your Mac, then the Tech Services administrator would have already approved them so you should not be prompted for approval.
System extensions work in the background to extend the functionality of your Mac. Some apps install kernel extensions, or kexts—a kind of system extension that works using older methods that aren't as secure or reliable as modern alternatives. Your Mac identifies these as legacy system extensions.
In 2019, Apple informed developers that macOS Catalina will be the last macOS to fully support legacy system extensions, and we've been working with developers to transition their software.
If you get an alert about a system extension
You may see an alert on your Mac that says that a program loaded or tried to load a system extension signed by the developer of that extension.
- The alert may ask you to open Security & Privacy preferences to allow the extension. You may also need to restart your Mac.
- The alert may ask you to contact the developer for support because the extension needs to be updated or will be incompatible with a future version of macOS.
- The alert may inform you that it will damage your computer and has been blocked.
On a Mac with Apple silicon, you may first need to use Startup Security Utility to set the security policy to Reduced Security and select the “Allow user management of kernel extensions from identified developers” checkbox.
System administrators can also use Mobile Device Management (MDM) to manage legacy system extensions.
Bluestacks Not Launching
If necessary, please contact the developer to learn whether an updated version of their software is available or planned. They may also be able to explain how to remove or disable the extension, and the consequences of doing so.
Bluestacks Not Loading Mac
Technical details for developers are available in Deprecated Kernel Extensions and System Extension Alternatives.