Mac Tutorial

How To Change The Virtualbox Guest macOS Virtual Machine Screen Resolution

After installing macOS on VirtualBox virtual machine, when I start it, I found the screen resolution is too low to display the whole screen bigger. So I need to change the macOS virtual machine’s screen resolution to make the screen fully fill the virtual machine’s window. This article will tell you how to do it.

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How To Fix The Error Unable To Insert The Virtual Optical Disk VBoxGuestAdditions.iso Into The Machine

After installing the virtual machine in VirtualBox, I want to change the virtual machine’s screen resolution in the virtual machine. So I click the VirtualBox Manager or Virtual Machine’s Devices —> Insert Guest Additions CD image… menu item. But it shows the error message like Unable to insert the virtual optical disk C:\Program Files\Oracle\VirtualBox\VBoxGuestAdditions.iso into

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How To Turn On/Off SIP (System Integrity Protection) On Mac OS

When you install mac software, you may encounter a warning message like “XXX” cannot be opened because of a problem. Please contact the developer to confirm that “XXX” can be used with the macOS version. You may need to reinstall the application. Be sure to install any available updates for this application and macOS. This

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