MP 1,1-5,1 OpenCore: VMM off, Big Sur upgrade still appears? How to fix??

[eicca]

I'm using RefindPlus to chainload OpenCore so I can get hardware acceleration and Night Shift on my Mojave install.

I specifically configured OpenCore NOT to VMM spoof so it wouldn't ask me to upgrade. It never showed a Catalina upgrade available.

Now Software Update keeps telling me to upgrade to Big Sur. I've run a terminal command to ignore the update but it persists.

How do I make it stop??!

 

[KaliYoni]

This utility was mentioned today on a Mac troubleshooting site I follow:

bigsurblocker/README.md at main · hjuutilainen/bigsurblocker

Block Big Sur installer app from launching. Contribute to hjuutilainen/bigsurblocker development by creating an account on GitHub.

github.com

I haven't used it so I can't say if it's great or not great. But probably worth checking out.

 

[eicca]

That app looks like it stops the installer from launching. My problem is the badge on the Settings icon and the fact that it's appearing at all in the Software Update.

My deeper question is why does Software Update think my computer is eligible for Big Sur to begin with? I've disabled the VMM flagging in OpenCore specifically to prevent this sort of thing.

 

[h9826790]

Do you have these in your OpenCore config?

<key>FirmwareFeatures</key>
<data>A1QM4A==</data>
<key>FirmwareFeaturesMask</key>
<data>P/8f/w==</data>

 

[eicca]

Do you have these in your OpenCore config?

<key>FirmwareFeatures</key>
<data>A1QM4A==</data>
<key>FirmwareFeaturesMask</key>
<data>P/8f/w==</data>

I have:

<key>FirmwareFeatures</key>
<data>
</data>
<key>FirmwareFeaturesMask</key>
<data>
</data>

 

[eicca]

Further info from my config file:

<key>SMBIOS</key>
<dict>
<key>BIOSReleaseDate</key>
<string></string>
<key>BIOSVendor</key>
<string></string>
<key>BIOSVersion</key>
<string></string>
<key>BoardAssetTag</key>
<string></string>
<key>BoardLocationInChassis</key>
<string></string>
<key>BoardManufacturer</key>
<string></string>
<key>BoardProduct</key>
<string>Mac-7BA5B2D9E42DDD94</string>
<key>BoardSerialNumber</key>
<string></string>
<key>BoardType</key>
<integer>0</integer>
<key>BoardVersion</key>
<string></string>
<key>ChassisAssetTag</key>
<string></string>
<key>ChassisManufacturer</key>
<string></string>
<key>ChassisSerialNumber</key>
<string></string>
<key>ChassisType</key>
<integer>0</integer>
<key>ChassisVersion</key>
<string></string>
<key>FirmwareFeatures</key>
<data>
</data>
<key>FirmwareFeaturesMask</key>
<data>
</data>
<key>PlatformFeature</key>
<integer>0</integer>
<key>ProcessorType</key>
<integer>1281</integer>
<key>SmcVersion</key>
<data>
</data>
<key>SystemFamily</key>
<string></string>
<key>SystemManufacturer</key>
<string></string>
<key>SystemProductName</key>
<string></string>
<key>SystemSKUNumber</key>
<string></string>
<key>SystemSerialNumber</key>
<string></string>
<key>SystemUUID</key>
<string></string>
<key>SystemVersion</key>
<string></string>
</dict>
<key>UpdateDataHub</key>
<false/>
<key>UpdateNVRAM</key>
<false/>
<key>UpdateSMBIOS</key>
<true/>
<key>UpdateSMBIOSMode</key>
<string>Create</string>
</dict>

So my board is indicated as Mac-7BA5B2D9E42DDD94 which means it's spoofing a 2017 iMac Pro.

HOWEVER. My VMM flag, which is supposed to be the part that allows Software Update to recommend unsupported OSs, is the following:

</array>
<key>Block</key>
<array/>
<key>Emulate</key>
<dict>
<key>Cpuid1Data</key>
<data>
AAAAAAAAAAAAAAAAAAAAAA==
</data>
<key>Cpuid1Mask</key>
<data>
AAAAAAAAAAAAAAAAAAAAAA==
</data>
<key>DummyPowerManagement</key>
<false/>
<key>MaxKernel</key>
<string></string>
<key>MinKernel</key>
<string></string>
</dict>

My VMM flag is OFF, according to the wiki.

Why is it still telling me to upgrade to Big Sur?! And why has it only started doing it this week? I've been running this OpenCore setup for two months now.