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I got started on Blender last September. I bought a Mac 3.8 GHz Intel Core i7 8 cores, 32 GB 2667 MHz DDR4, with AMD Radeon Pro 5500 XT 8 GB graphics card. I am using version 2.90 of Blender and unfortunately with the Cycles render mode, AMD Radeon cards are not supported. The rendering execution time is therefore longer. Do you know if Blender will adjust this in future releases. Do you advise me instead to switch to Windows to have a compatible graphics card.

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    $\begingroup$ Radeon cards are supported in blender (though admittedly have more issues than nvidia cards) - some of the most recent problems relate to the latest Adrenalin Drivers. Rolling back to an older driver version fixes this for many people. However, you are using a mac, which complicates things slightly. I understand mac uses Metal for a graphics API as opposed to OpenGL or DirectX, which might be responsible for some of the problems you are having. Blender is built upon OpenGL, and is DirectX compatible, but I don't think it supports Metal at this time. $\endgroup$ – Christopher Bennett Mar 1 at 15:40
  • $\begingroup$ I have tried AMD ProRender and I don't know why but it was not faster at all. Considering that Blender is built upon OpenGL and DirectX and considering that since I discovered last September Blender (during covid 19) and I love so much this App. I will sale my new Mac(2020)and buy a more compatible computer and operating system whatever the price. Does anyone could suggest me a product? A big thank! Andre $\endgroup$ – Andre Mar 10 at 13:08
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Preferences > System > Cycles Render Devices and select OpenCL. You can also try AMD ProRender: https://www.amd.com/en/technologies/radeon-prorender-blender

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