When I start Parallels Desktop for Mac on macOS High Sierra I get the following warning: System Extension Blocked.A program tried to load a new system extension signed by 'Parallels International GmbH' and it was blocked. Download Parallels Desktop 11 For Mac Free Cracked Parallels Desktop 11 For MacDescriptionReady for Windows 10 and El CapitanRun Windows® 10 in a virtual machine with ease. Upgrade Windows 7 or 8 to Windows 10, or create a brand new virtual machine with Windows 10.
- 9.0Outstanding
Pros
- ✓Runs Windows and Linux VMs on Macs
- ✓Tight integration of Windows and Mac features
- ✓Improved performance and battery life
- ✓Supports Windows 10 and OS X El Capitan
Cons
- ✕Requires plenty of memory and processor power
- ✕Poor documentation for newcomers
Updates to the popular Parallels Desktop virtualisation program generally coincide with new versions of the Mac operating system, so it's no surprise to see that Parallels Desktop 11 arrives just a few weeks ahead of Apple's new OS X v10.11 -- a.k.a. El Capitan. But, of course, this year's update also follows the recent arrival of Windows 10, which means that Parallels Desktop 11 is a fairly major update that provides support for both of these new operating systems.
Hey Cortana, where's Siri?
The most impressive aspect of Parallels Desktop 11 is not simply that it allows you to run Windows as a virtual machine (VM) on the Mac (along with various versions of Unix, and even Android and ChromeOS too), but that it continues to integrate the Mac and Windows environments so that features from each operating system become almost interchangeable.
One of the headline features in Windows 10 is Cortana, the 'personal assistant' that lets you use voice commands to find information on the web, send messages and perform a variety of other tasks. Cortana is often compared to Apple's Siri, but Siri is currently only available on Apple's iOS devices and doesn't run on the Mac. Parallels Desktop 11 therefore pulls off quite a trick by allowing Cortana to not only run within a Windows 10 virtual machine, but also to run with the VM hidden or running in the background while you work in native Mac apps. So, while I'm typing this review in Apple's Pages wordprocessor, I can say 'Hey Cortana - schedule a meeting'. The Cortana window then pops up from the Dock on the Mac desktop and lists options for my meeting.
OS integration
Other examples of this OS integration include the Mac's QuickLook option, which now works within Windows too, allowing you to preview documents stored on a Windows virtual machine just by hitting the space bar on your keyboard.
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Symptoms
When I start Parallels Desktop for Mac on macOS High Sierra I get the following warning:
System Extension Blocked. A program tried to load a new system extension signed by 'Parallels International GmbH' and it was blocked. If you want to enable extensions from this developer, go to the Security & Privacy System Preferences pane.
- I am trying to press 'Allow' button but nothing happens.
Cause
macOS High Sierra 10.13 introduces a new feature that requires user approval before loading newly-installed third-party kernel extensions. Third-party kernel extensions (KEXTs) that were already present when upgrading to macOS High Sierra are granted automatic approval.
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This approval UI is only present in the Security & Privacy preferences pane for 30 minutes after the alert. Until the user approves the KEXT, future load attempts will cause the approval UI to reappear but will not trigger another user alert.
For more information please refer to the Apple's official tech note: Technical Note TN2459.
Moreover, it's not possible to press Allow button if a connection to Mac established remotely due to security-related configuration of macOS to block any security related actions for remote connections.
Resolution
Before performing the instructions below quit Google Chrome application using its Dock context menu > Quit if it's running now.
Open System Preferences > Security & Privacy > General > click Allow next to the corresponding message:
If it's not possible to click Allow button or after clicking it nothing happens, ensure that the following recommendations are followed:
- Allow button is pressed locally. As mentioned above, due to macOS security limitations it's not possible to press Allowbutton (nothing will happen as a result of pressing it) remotely (any source of remote connection).
- No third-party input methods (keyboards, mouses, touch pads, graphics tablets) and their software are present at the moment Allow button is pressed.
Presence of third-party input methods and their software/drivers could possible cause the inability to press Allow button. Temporarily disconnect such devices from the Mac and remove their software/drivers.
It has been proven that only a presence of MagicPrefs preference pane render the Allow button unusable. Once Allow button is successfully used, macOS will store this record and it would be possible to continue using previously disconnected devices and install their software/drivers back.
Advanced solution
Uninstall Parallels Desktop 11 For Mac
If pressing Allow button using the mouse doesn't give any positive results, use the steps described below:
- Open System Preferences > Security & Privacy > Keyboard > Shortcuts and switch Full Keyboard Access to All controls.
- Now open System Preferences > Security & Privacy > General.
- Press Tab key on the keyboard until the Allow button is highlighted, then hit Spacebaron the keyboard to press Allow button.
- Close System Preferences window and start Parallels Desktop.
Why Parallels Desktop needs its own kernel extensions?
To deliver all Parallels Desktop features, such as virtualization, USB and Network, Parallels Desktop loads the following kernel extensions to macOS:
com.parallels.kext.hypervisor - a proprietary core virtualization driver, which makes Parallels Desktop the best virtualization solution for Mac.
com.parallels.kext.vnic - Shared Network driver, which is used by a virtual router who manages all network services for a VM, such as gateway,DNS, DHCP, port forwarding, network conditioner etc.
com.parallels.kext.usbconnect - USB driver, loaded when a USB device connects to a virtual machine (VM). Supports all USB data transfer protocols except of isochronous transfer.
com.parallels.kext.netbridge - Bridged Network driver, creates a virtual network adapter on Mac to connect a VM to Mac's subnet directly.