Redhat/CentOS/ClearOS are not bleedin-edge products so are not brilliant on the latest hardware. I don't think Ryzen processors are yet supported and so on.

Hi Nick I am installing on high end workstation hard ware not the mac - Mac is my pc of choice for every day use. I am installing on an i7 with dedicated graphics 16gb RAM and onboard RAID. I have a Raid 1 setup. As per my accepted answer I installed in the low graphics mode under troubleshooting. Wish it wasn't quite as hidden might have given it a try much earlier in the day. The issue still remains that website is downloading the latest 7.4 iso but it is labelled as 7.3 and the checksum is in now way related to either the 7.3 or the 7.4 iso's. Seriously frustrating day today.

Hi Graeme,
The latest iso's should be available from the mirrors this one. I believe the ClearOS-DVD-x86_64.iso image is the same as the ClearOS-DVD-x86_64-7.4.0.204729.iso image. I think this is the one I tested a few weeks ago and it installed correctly so I am wondering if the Mac has a hardware incompatibility.

Check sums I have found
# The image checksum(s) are generated with sha256sum.
b14201b3f62c875bef3e34062c6a3595dd9e8c57099902f9e92efbce728d609a *ClearOS-DVD-x86_64-7.3.0.192627.iso
89ebba21c8f66e8e0682b83b11c14b615362052c862ef25355c5167015a2db7d *ClearOS-netinst-x86_64-7.3.0.192627.iso

# The image checksum(s) are generated with sha256sum.
b3530d0402a40da34a92c047abb7b2370429ae1b5d2de3c153ff351f75ae4b52 *ClearOS-DVD-x86_64-7.4.0.204729.iso

ce4c6240576a6c5de957e1e16b657a87f0e45e099c8ff2bcb95a398a4dff5409 *ClearOS-netinst-x86_64-7.4.0.204729.iso

None of the above are ac1a12dbcf0f94d7495aa1cd4b8db470571c207ed1c481cb80b8a65631a1cc10 which is what the downloads page lists as the check sum for 7.3!
Neither of the 7.4 iso's are working - I tried the netinstall in the hopes it would work I have tried a couple of different mirrors in the hope that the one is was using was corrupt.
I am now downloading the actual 7.3 DVD install - I wonder how that will go .. This might actually take me to my TB download limit this month....

Well it turns out that after much faffing around I found the checksum on a mirror - turns out that even though the website says 7.3 it's actually 7.4 and that the checksum on the site is the 7.3 checksum and the checksum when compared to the 7.4 checksum is correct. So still no further than that but at least the iso is valid. It does not help me get past the "starting dracut initqueue hook" it hangs with a solid cursor not flashing..