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So the latest Gigabyte BIOSes don't let you disable this anymore. I would probably be fine with "Disable the serial port in Clover by setting IOST = 0" as I don't need PS2 mice or anything else that has been mentioned as being a side effect. Does anyone know how to actually do this? I don't...

Newest Gigabyte BIOS boards (I had F10 and upgraded to F11 on Gigabyte Z390 Aorus Master) do not allow you to disable "Super IO Serial" This thread here has more information about disabling it now. https://www.tonymacx86.com/threads/solution-com-serial-port-on-gigabyte-z170x-running-10-11-4.191172/

I'm right there with you. I've got a Nvidia 670 and 770 that I've had for a long time through a couple of mobo+cpu+ram+storage upgrades for years. I have the 770 in a CoffeeLake build right now and the UI performance is terrible... Playing youtube videos? stutter, drop frames etc. Have an...

Z87X-UD3H arrived today. Started off pretty well. Didn't have to boot with any kernel flags for install. Had to boot maxmem=4096 to get on actual os and install with multibeast. However, after a while (normal booting), the computer froze on its own not doing anything. Disable sleep and...

I have ran quite a few tests and have achieved semi-random stability. Also, statistically significant, booting with -v flag seems to make it much better. But not perfect! I'm not sure if it is memory, the supposed haswell memory issue, or MLB issue.

Further investigation, I tried a different monitor (this one has been a little flickery recently and it was easy to try a different one). I've set RAM back to auto everything (1333MHz default timings) I've gotten multibeast installed, but it is still super unreliable. Freezes on login...

I've had kernel panics/freezes that started on my machine around 10.9.2 (thought they could be a coincidence). They seem to be getting worse. I've read some stuff about memory, frequency and timings. I've attempted to set them right, but still either get KP on boot, or freeze shortly...

Ok, issue resolved (mostly...). I googled around and found some 'real mac' users having somewhat similar issues with my Seagate drives. Running a Seagate utility that keeps the drive from auto-sleeping, resolved the un-mounting randomly, but did NOT resolve the transfer speed issues. I went...

Bump. I've been unable to resolve the issue. Does anyone have a PCIe USB3 card they can recommend (non built in USB3)?

After some experimentation (and upgrading to 1.2.6->1.2.7). I can say there is probably some kind of SW issue at play here. Un-mounted drive to drive copy results in ~150MBps bandwidth over USB3. (internal SATA 3TB disk to USB3 4TB disk). I assume that is using /dev/rdiskx and something...

Sorry, I didn't mention the logic board in this case is a P55m-UD2 with Rocketfish USB 3 card. I doubt Bios would help in this case. I used the oddly shapped USB3 cable that came with the HDD,s but I have tried 2 different sets of power/hdd/cables as part of my troubleshooting process...

I got the Rocketfish USB 3 PCIe card to work easily enough using the included generic USB3 multi beast installer. Things were looking pretty good, I was able to duplicate a USB3 hard drive to a bare internal drive (disk util restore), and while the disk technically wasn't mounted, this went...

You were of course correct, sorry for taking so long to reply to thank you.

I'm having a hard time getting HDMI audio going on a P55m-UD2 (F11) and nVidia GT630, using DSDT downloaded from here. Patched using MaciASL with the Award bios patch (from your github 5 series repo). And using MultiBeast 'With-DSDT' for HDA888a (887) I have verified layout id's in the DSDT...

M - HDMI Audio I thought SSDT only worked if you edited the DSDT to remove the hdef method already in them. Cause thats what I did! So just as easy with GT640 or something?

M - HDMI Audio Sorry, I didn't mean to say that HD3000 graphics issues were related to HDMI. Thats what I'm saying though, HD3000 has been too buggy, and doesn't seem to be getting better for me. I have my HDMI audio working in 10.9 with HD3000 per spec, and everything is as fine as it...

M - HDMI Audio Am I correct in reading that if you had, say, a Nvidia GT640 with HDMI out, that you wouldn't need to do anything special under 10.9 to get audio out over that HDMI working? I have a H61n-USB3 with a HD3000 cpu, and have used everything form edited kexts to edited DSDT's, to...

Good news. This problem appears to be fixed in Mountain Lion. I have a slightly smaller problem which is that after reboot sometimes, my screen is extra zoomed in, and I have to go into Displays and manually change the resolution to something like 720p and then back to 1080p for the display...

I'd take not being able to enable xhci if it meant I could sleep properly. So I've used both the old Multibeast and 5.0.2 with the above pictured (also tried the i7 SSDT) but I cannot get the computer to go to sleep. It goes to sleep then wakes up after about 2 seconds. ALSO probably...

10.7.4 update did not help. I still experience problems where I will get lines across the screen. Or the video will hang and I am forced to ssh+reboot the machine or press and hold the power. I believe this is a software implementation problem with the HD3000 graphics. If anyone has any...