Mac OS Mojave and Legacy Series 5 motherboards (AHCI workaround)

[fx600]

In High Sierra, I had to use kext patching for series 5 motherboards AHCI (without it, my system was unstable with random hangs due to disk errors or would hang at clover scan). Any news on the same with Mojave, does the patch work as well, is it needed? Thanks

 

[sos86]

I can't get the Intel SATA ACHI fix to work on my ASUS P7P55D-E-Pro motherboard in Mojave.

https://www.tonymacx86.com/threads/solved-ich10r-and-high-sierra.233435/page-4

In Mojave I get the same problem I had in High Sierra before the patched kext/prelinked kernel solution i.e. the Mojave installer boots fine, but can't see any discs to install to on the (blue in my case) Intel SATA ports. Trying to format a drive using disk utilities in the installer results in an "unable to write to last block" error.

The mojave installer will see & start to install if the drive is plugged to the two grey 6GB Marvell 88SE91xx ports, but on reboot, clover doesn't show the drives, so that's a no-go either.

As Mojave doesn't support 32-bit apps (so no more "Return to Dark Castle"), and my GTX460 doesn't support metal API, I'm gonna stick with HS it seems.

 

[fx600]

That's unfortunate

 

[BreBo]

In High Sierra, I had to use kext patching for series 5 motherboards AHCI Any news on the same with Mojave, does the patch work as well, is it needed?

Try:
AppleAHCIPort
Find --> 40600200
Replace --> 00000000

<dict>
    <key>MatchOS</key>
    <string>10.14.x</string>
    <key>Comment</key>
    <string>ALPM IO Error AppleAHCIPort</string>
    <key>Disabled</key>
    <false/>
    <key>Find</key>
    <data>
    QGACAA==
    </data>
    <key>Name</key>
    <string>AppleAHCIPort</string>
    <key>Replace</key>
    <data>
    AAAAAA==
    </data>
</dict>

 

[Mulekick]

BreBo,
This worked great on my Asus P7P55D! How in the world did you find/figure this out? Without this patch, the installer would not complete. I assumed I was going to be stuck with High Sierra. Thanks again for this! Now I just need Nvidia drivers. P.S. I'm replying to this thread from Safari in Mojave.

Try:
AppleAHCIPort
Find --> 40600200
Replace --> 00000000

<dict>
    <key>MatchOS</key>
    <string>10.14.x</string>
    <key>Comment</key>
    <string>ALPM IO Error AppleAHCIPort</string>
    <key>Disabled</key>
    <false/>
    <key>Find</key>
    <data>
    QGACAA==
    </data>
    <key>Name</key>
    <string>AppleAHCIPort</string>
    <key>Replace</key>
    <data>
    AAAAAA==
    </data>
</dict>

 

[BreBo]

How in the world did you find/figure this out? Without this patch, the installer would not complete.

It's the patch I use for my Lynnfield build with High Sierra, and I read somewhere that it should also work on Mojave.

 

[sos86]

Success on my P7P55D-E-Pro too, thanks Brebo. Even my non-metal capable GTX460 works, although there are no transparency effects.

 

[BreBo]

Even my non-metal capable GTX460 works, although there are no transparency effects.

Try Nvidia Fermi on macOS Mojave

 

[sos86]

Try Nvidia Fermi on macOS Mojave

Well, I'll be again... it works! Transparencies, smooth graphics, no tearing/glitching, and Dark Castle works (a 32-bit app, which I thought Mojave was ditching)!

Only minor issue is the top menu bar is quite dark/dim - and no, I'm not on dark mode or dynamic mode.

EDIT: ended out getting an RX580 Nitro+ 8GB card, which works out of the box using the DP (HDMI and DVI wouldn't work for me). Nice bright menu bars and transparencies

 

[saracli]

Can anyone help me get the on-board USB 3 working? I have Mojave running as Mac Pro 5,1 & I use a DisplayLink via a PCI USB 3 adapter for audio and NIC. However, the on-board USB won't play ball. Any ideas, anyone?..