Hi Abel, try the ViennaCL backend. It used to work in the past, but I don't know the current state of AMD drivers and OpenCL on OS X. Best regards, Karli On 4/14/20 5:50 AM, huabel via petsc-users wrote: > Dear PETSc users, > > Does PETSc suppurt AMD GPU card (such as RX 5700) on OS X? > > Thanks > Abel Hu >