Hi,
I've got a Mac Pro 2009 (flashed to 2010) and currently have 10.13.6 installed on an SSD and a Windows 10 installation on an internal HDD. If I use the AMD 4870 the Mac Pro came with I can hold the alt key on startup (windows keyboard
) and get to the startup drive selection screen every time. The Mac drive is selected first as default so if I hit enter I boot successfully into Mac OS or alternatively I can boot into Windows.
However .. if have my GTX 1080 installed I can't seem to get anywhere. I knew that having a normal PC card I lose the ability to see the screen. However I thought that if I hold Alt just the same .. wait and then hit enter it would take me to Mac OS. However it never never works. I can have the 1080 installed and let it boot to windows. Or I hit Alt .. and try and hit enter at the appropriate time and the screen never comes back no matter how long I wait.
If only the Mac drive is installed I can boot into Mac OS normally with the GTX1080 as I have the NVIDIA net drivers installed as the default driver.
I thought that having a non-flashed card meant you are unable to see the screen but it is still there i.e. I should be able to use the keyboard the navigate and boot into whatever I want (black screen not really stopping me). Am I wrong in this? Do I really need a flashed card to use the boot drive selection or is something else at play?
Thanks in advance for any thoughts! This is painful and I don't want to spend a load of money on a new card or for someone to reflash it for me only to find it wasn't the problem..
I've got a Mac Pro 2009 (flashed to 2010) and currently have 10.13.6 installed on an SSD and a Windows 10 installation on an internal HDD. If I use the AMD 4870 the Mac Pro came with I can hold the alt key on startup (windows keyboard
) and get to the startup drive selection screen every time. The Mac drive is selected first as default so if I hit enter I boot successfully into Mac OS or alternatively I can boot into Windows. However .. if have my GTX 1080 installed I can't seem to get anywhere. I knew that having a normal PC card I lose the ability to see the screen. However I thought that if I hold Alt just the same .. wait and then hit enter it would take me to Mac OS. However it never never works. I can have the 1080 installed and let it boot to windows. Or I hit Alt .. and try and hit enter at the appropriate time and the screen never comes back no matter how long I wait.
If only the Mac drive is installed I can boot into Mac OS normally with the GTX1080 as I have the NVIDIA net drivers installed as the default driver.
I thought that having a non-flashed card meant you are unable to see the screen but it is still there i.e. I should be able to use the keyboard the navigate and boot into whatever I want (black screen not really stopping me). Am I wrong in this? Do I really need a flashed card to use the boot drive selection or is something else at play?
Thanks in advance for any thoughts! This is painful and I don't want to spend a load of money on a new card or for someone to reflash it for me only to find it wasn't the problem..
