APFS: Implement ZLib downgrade for 12.4+

Applicable for pre-Sandy Bridge Macs

resources/build.py

@@ -237,6 +237,15 @@ class BuildOpenCore:
                 self.get_item_by_kv(self.config["Kernel"]["Patch"], "Comment", "SurPlus v1 - PART 1 of 2 - Patch read_erandom (inlined in _early_random)")["MaxKernel"] = ""
                 self.get_item_by_kv(self.config["Kernel"]["Patch"], "Comment", "SurPlus v1 - PART 2 of 2 - Patch register_and_init_prng")["MaxKernel"] = ""
 
+        # In macOS 12.4 and 12.5 Beta 1, Apple added AVX1.0 usage in AppleFSCompressionTypeZlib
+        # Pre-Sandy Bridge CPUs don't support AVX1.0, thus we'll downgrade the kext to 12.3.1's
+        # Currently a (hopefully) temporary workaround for the issue, proper fix needs to be investigated
+        # Ref: https://forums.macrumors.com/threads/macos-12-monterey-on-unsupported-macs-thread.2299557/post-31120235
+
+        # To verify the non-AVX kext is used, check IOService for 'com_apple_AppleFSCompression_NoAVXCompressionTypeZlib'
+        if smbios_data.smbios_dictionary[self.model]["CPU Generation"] < cpu_data.cpu_data.sandy_bridge.value:
+            self.enable_kext("NoAVXFSCompressionTypeZlib.kext", self.constants.apfs_zlib_version, self.constants.apfs_zlib_path)
+
         if not self.constants.custom_model and (self.constants.allow_oc_everywhere is True or self.model in model_array.MacPro):
             # Use Innie's same logic:
             # https://github.com/cdf/Innie/blob/v1.3.0/Innie/Innie.cpp#L90-L97

resources/constants.py

@@ -57,6 +57,7 @@ class Constants:
         self.apple_trackpad = "1.0.1"  #       AppleUSBTrackpad
         self.apple_isight_version = "1.0.0"  # AppleiSight
         self.apple_raid_version = "1.0.0"  #   AppleRAIDCard
+        self.apfs_zlib_version = "12.3.1"  #   NoAVXFSCompressionTypeZlib
 
         ## Apple - Dortania Modified
         self.bcm570_version = "1.0.2"  #             CatalinaBCM5701Ethernet
@@ -304,6 +305,10 @@ class Constants:
     @property
     def bigsursdxc_path(self):
         return self.payload_kexts_path / Path(f"Misc/BigSurSDXC-v{self.bigsursdxc_version}.zip")
+    
+    @property
+    def apfs_zlib_path(self):
+        return self.payload_kexts_path / Path(f"Misc/NoAVXFSCompressionTypeZlib-v{self.apfs_zlib_version}.zip")
 
     @property
     def mousse_path(self):