How to Fix 'Running in Software Rendering Mode' in Linux Mint 19.1 Cinnamon on VirtualBox?br br Install Virtualbox guest additions:-br br Step 1: Click on 'Devices' in menu.br br Step 2: Click on 'Insert Guest Additions CD Image'.br br Step 3: Click on 'Run', and then provide your Administrative password. Click on Authenticate.br br Step 4: After installation, Power off the machine.br br Now, we have to enable 3d Acceleration. br br Step 1: Click on 'Settings'.br br Step 2: Click on 'Display'.br br Step 3: Click on Check button beside 'Enable 3D Acceleration'.br br Step 4: Click on 'ok' button.br br Start your Linux mint and login, you will not see that error.