Finally my old Lenovo G50-70 notebook working 95% perfect with latest Catalina with external monitor /i3-4030U, Intel HD Graphics 4400, 4 GB DDR3 RAM, 128 GB SSD/ : r/hackintosh
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How to upgrade RAM memory in Lenovo G50-70 laptop - YouTube
How to upgrade RAM memory in Lenovo G50-70 laptop - YouTube