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Hi. I have got a HP Probook 450 G4. Intel Core i7-7500U 2.7 GHz Memory: 8 GB DDR4 Storage: 256 GB SSD Graphics Card: Intel HD Graphics 620 I installed latest mac os sierra 10.12.4 but there is a big problem. I must use usb mouse. i cannot use track pad in my music applications. it's so hard...