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ati radeon hd 4670 256mb

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    iMac Mid 2011 GPU acceleration problem after installing Catalina dosdude1 Patcher 2020

    I installed successfully Catalina using dosdude1 patcher on my iMac (21.5-inch, Mid 2011). As it has "AMD Radeon HD 6750M 500MB" graphic card so GPU didn't work. i got no hardware acceleration which made my graphics performance laggy poor, sleep & brightness functions didn't work either. I tried...
    • ranaharoon
    • Thread
    • amd radeon hd 6750m 500mb ati radeon hd 4670 256mb catalina 10.15.7 dosdude catalina patcher gpu acceleration graphic problem imac mid 2011 21.5"
    • Replies: 5
    • Forum: iMac
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