<< Solved >> ICH10 patch for AppleAHCIPort on Catalina 10.15.2

[sfinktah]

If you’re trying to run Catalina on a older (e.g. Sandy Bridge) system, you’re probably going see random freezing characterized by the HDD light being on.

The solution is an updated ICH10 patch, an smbios machine type of iMac12,2 and -no_compat_check boot option.

<dict>
                <key>Comment</key>
                <string>fix I/O error for ICH10 - sfinktah</string>
                <key>Disabled</key>
                <false/>
                <key>Find</key>
                <data>g+b+ZoXJD5jAQQjEdQtEifjB6BqD4AEJxg==</data>
                <key>InfoPlistPatch</key>
                <false/>
                <key>MatchOS</key>
                <string>10.15.x</string>
                <key>Name</key>
                <string>AppleAHCIPort</string>
                <key>Replace</key>
                <data>g+b+ZoXJD5jAQQjEdgtEifjB6BqD4AEJxg==</data>
            </dict>
            <dict>
                <key>Comment</key>
                <string>fix I/O error for ICH10 - sfinktah</string>
                <key>Disabled</key>
                <false/>
                <key>Find</key>
                <data>icqB4kBgAgCB+kAgAAB1DIHhv3///4mLaQEAAA==</data>
                <key>InfoPlistPatch</key>
                <false/>
                <key>MatchOS</key>
                <string>10.15.x</string>
                <key>Name</key>
                <string>AppleAHCIPort</string>
                <key>Replace</key>
                <data>kJCQkJCQkJCQkJCQkJCQkJCQkJCQkJCQkJCQkA==</data>
            </dict>

The patch pasted above was created by examining the effect of the original 10.13, and performing a “best effort” transform to match the the 10.15.2 kext.

There are other (less qualified) patches that can be found, but they only patch the hot plug issue.

Similarly, Mojave patches exist too.


These should really be options in MultiBeast — why have Sandy Bridge SSDTs in there, if no Sandy Bridge system is going to work without the above patch.

And it is extremely hard to determine that such older systems are crashing due to ICH10 issues when you’re foolishly thinking that you have a HD3000 issue.

BTW - this patch has been tested on a Z68X—UD7-B3 which has NO iGPU support. All seems stable (6 days uptime). YMMV if you have onboard HD3000.

 

[tman77]

Man you really made day. Thanks a million!! I was struggling around for weeks with random freezes on Catalina. Sometimes it happened twice a day, sometimes only once in three days. I thought my old hardware was the reason. I tried different Smbios, edited DSDT, defined fake ID´s for IGPU which is simply not supported on my board.....I always thought it had something to do with the IGPU. Now with your patch I'm good for four days now. Perhaps you could mention that with iMac12,2 you loose VDA decoder support. I went back to iMacpro1,1. Not an optimal solution (higher temperature on cpu) but ok for me right now. I agree with you that this should be taken in the new MultiBeast. Could save a lot of time ;-)

 

[ls2025]

Good applause for you

 

[XPbIM3]

No luck with ASUS P6T SE and Catalina 10.15.4

 

[XPbIM3]

            <dict>
                <key>#MatchOS</key>
                <string>10.13.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>

This one is working for HS/Mojave/Catalina

 

[IvanH]

this above patch working fine in my system, thank you very much!

 

[atshoom]

could that help with an issue of black screen/crash when going out of sleep.
I'm struggling to find a "recipe" to have a fresh catalina on GA-Z68X-UD3H-B3.

If anyone can help, that would be greatly appreciated.