Other HD 4870 very lag in mac os x 10.11.1 (mac pro 1.1 )

[victorgbrmr]

Hi guys, I've made some old posts again and you guys helped me a lot, so I came to make a new post and I hope to find a solution. My problem is that my XFX HD4870 with modified EFI ROM works great on Windows. However, on Mac OS X 10.11.1 it's really slow. Is there anything I can do to get it back to normal? I'll leave some pictures and a video to try to show the real problem. Config: Mac Pro 1.1 26GB DDR2 FB DIM XFX HD4870 1024MB SSD 120 Windows SSD 120 El Capitan HDD 160GB BKP I'll upload the video to Mega, I don't think you'll need to download it to watch it.

219.56 MB file on MEGA

mega.nz

 

[Certificate of Excellence]

It sounds like your card is not accelerated under macOS. Reading up on flashing one of these for use in a cMP 1,1 has put me off LOL. If it were me, Id pick up an affordable, mac compatible GPU like GT 240 (mind you NOT Apple/mac branded). They're plug-n-play, will work w/ acceleration in both mac and windows (mac will not show the apple boot screen but will boot directly into macos desktop just the same) and are cheap & plentiful Here's one identically spec'd to the one in my cMP 1,1 (GT240 1gb DDR3) for $20. There is a DDR3 version and DDR5 version of this card. Mine is the slower @ 25mb/sec - the DDR5 model will double the GPUs bandwidth to over 54mb/sec but costs more (around $30+) if you go that route. If I was buying the card, Id buy the DDR5 variant, but I already had the DDR3 card from a very old gaming box build so is what I went with - works great for my basic DD needs. One thing to consider is I believe any Kepler series card should work out of the box with ElCap, so looking at cards up to GTX680 is worth it. Ive seen that card used go as low as new DDR5 1gb GT240s and is twice the card @ 2gb GDDR5.

Either way, good luck!

 

[Nguyen Duc Hieu]

Can you flash the original VBIOS to your HD4870 again? I guess Mac OS X couldn't detect and assign a proper driver to accelerate your GPU.
I tested both HD6670 2GB and GTX680 2GB on my MP 1,1. Both worked fine.