That way we can better recommend what level of card you should get. Default and Best Mac Pro Video Cards/Video Card Upgrades: mac-store.5v.plĪmmd Any help would be greatly appreciated! Put a number on it.Check if an app is using the dedicated GPU.I Want The Best Graphics Card for my Mac Pro, Where Do I Start? - mac-store.5v.pl.Apple assumes no responsibility with regard to the selection, performance, or use of third-party websites or products. Information about products not manufactured by Apple, or independent websites not controlled or tested by Apple, is provided without recommendation or endorsement. Holding down Option while restarting doesn't allow you to choose an operating system on these Mac Pro models. If your Mac has more than one volume with macOS installed, you need to use the Startup Disk pane in System Preferences to switch between operating systems. If the graphics card in your Mac Pro isn't listed above, you need to install one that's compatible with macOS Mojave. You also need to turn off Download microsoft 2010 for mac.