Guest DM666 Posted December 27, 2021 Posted December 27, 2021 Moved a working Areca ARC-1883x PCIe SAS host card from my 2012 Mac Pro to a new macpro7,1 (2019). The macpro7,1 has 2 MPX GPU modules, an Afterburner card, and the Apple I/O card. So, 2 empty PCIe slots. The slot in which the ARC-1883x card is installed is showing as empty in the PCI Cards tab of About This Mac, as well as in System Info. The drivers (kernel extensions) are not loading, which makes sense since the OS sees no card in the slot. I switched slots and still no joy. I'm trying... Read more Source: MacRumors
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