diff --git a/AppleModels/DataBase/MacBook/MB81.yaml b/AppleModels/DataBase/MacBook/MB81.yaml
index 02484a51..4354a31f 100644
--- a/AppleModels/DataBase/MacBook/MB81.yaml
+++ b/AppleModels/DataBase/MacBook/MB81.yaml
@@ -163,4 +163,4 @@ AppleModelYear:
   - 2015
   - 2016
 MinimumOSVersion: "10.10.2"
-MaximumOSVersion: "11.6.3"
+MaximumOSVersion: "11.6.4"
diff --git a/AppleModels/DataBase/MacBookAir/MBA61.yaml b/AppleModels/DataBase/MacBookAir/MBA61.yaml
index 448cc807..ec1dfda9 100644
--- a/AppleModels/DataBase/MacBookAir/MBA61.yaml
+++ b/AppleModels/DataBase/MacBookAir/MBA61.yaml
@@ -176,4 +176,4 @@ AppleModelYear:
   - 2014
   - 2015
 MinimumOSVersion: "10.9.2"
-MaximumOSVersion: "11.6.3"
+MaximumOSVersion: "11.6.4"
diff --git a/AppleModels/DataBase/MacBookAir/MBA62.yaml b/AppleModels/DataBase/MacBookAir/MBA62.yaml
index 6c46e900..7d49fdfe 100644
--- a/AppleModels/DataBase/MacBookAir/MBA62.yaml
+++ b/AppleModels/DataBase/MacBookAir/MBA62.yaml
@@ -186,4 +186,4 @@ AppleModelYear:
   - 2014
   - 2015
 MinimumOSVersion: "10.9.2"
-MaximumOSVersion: "11.6.3"
+MaximumOSVersion: "11.6.4"
diff --git a/AppleModels/DataBase/MacBookPro/MBP111.yaml b/AppleModels/DataBase/MacBookPro/MBP111.yaml
index 7c10d742..3dfac2c1 100755
--- a/AppleModels/DataBase/MacBookPro/MBP111.yaml
+++ b/AppleModels/DataBase/MacBookPro/MBP111.yaml
@@ -214,4 +214,4 @@ AppleModelYear:
   - 2014
   - 2015
 MinimumOSVersion: "10.9.4"
-MaximumOSVersion: "11.6.3"
+MaximumOSVersion: "11.6.4"
diff --git a/AppleModels/DataBase/MacBookPro/MBP112.yaml b/AppleModels/DataBase/MacBookPro/MBP112.yaml
index 984fb12c..3e3f24b2 100644
--- a/AppleModels/DataBase/MacBookPro/MBP112.yaml
+++ b/AppleModels/DataBase/MacBookPro/MBP112.yaml
@@ -167,4 +167,4 @@ AppleModelYear:
   - 2014
   - 2015
 MinimumOSVersion: "10.9.4"
-MaximumOSVersion: "11.6.3"
+MaximumOSVersion: "11.6.4"
diff --git a/AppleModels/DataBase/MacBookPro/MBP113.yaml b/AppleModels/DataBase/MacBookPro/MBP113.yaml
index 6a09322f..be458ec5 100644
--- a/AppleModels/DataBase/MacBookPro/MBP113.yaml
+++ b/AppleModels/DataBase/MacBookPro/MBP113.yaml
@@ -156,4 +156,4 @@ AppleModelYear:
   - 2014
   - 2015
 MinimumOSVersion: "10.9.4"
-MaximumOSVersion: "11.6.3"
+MaximumOSVersion: "11.6.4"
diff --git a/AppleModels/DataBase/iMac/IM144.yaml b/AppleModels/DataBase/iMac/IM144.yaml
index fc0f2144..40683b26 100644
--- a/AppleModels/DataBase/iMac/IM144.yaml
+++ b/AppleModels/DataBase/iMac/IM144.yaml
@@ -119,4 +119,4 @@ AppleModelYear:
   - 2014
   - 2015
 MinimumOSVersion: "10.9.3"
-MaximumOSVersion: "11.6.3"
+MaximumOSVersion: "11.6.4"
diff --git a/AppleModels/DataBase/iMac/IM151.yaml b/AppleModels/DataBase/iMac/IM151.yaml
index 56fdbfe2..0cb6e0b3 100644
--- a/AppleModels/DataBase/iMac/IM151.yaml
+++ b/AppleModels/DataBase/iMac/IM151.yaml
@@ -152,4 +152,4 @@ AppleModelYear:
   - 2014
   - 2015
 MinimumOSVersion: "10.10.2"
-MaximumOSVersion: "11.6.3"
+MaximumOSVersion: "11.6.4"
diff --git a/Utilities/macrecovery/boards.json b/Utilities/macrecovery/boards.json
index be4b2763..859cf956 100644
--- a/Utilities/macrecovery/boards.json
+++ b/Utilities/macrecovery/boards.json
@@ -11,14 +11,14 @@
  "Mac-942B59F58194171B": "10.13.6", 
  "Mac-B809C3757DA9BB8D": "latest", 
  "Mac-7DF2A3B5E5D671ED": "10.15.7", 
- "Mac-35C1E88140C3E6CF": "11.6.3", 
+ "Mac-35C1E88140C3E6CF": "11.6.4", 
  "Mac-942459F5819B171B": "10.13.6", 
  "Mac-77EB7D7DAF985301": "10.15.7", 
  "Mac-827FB448E656EC26": "latest", 
  "Mac-7BA5B2DFE22DDD8C": "latest", 
  "Mac-2E6FAB96566FE58C": "10.15.7", 
  "Mac-F2208EC8": "10.13.6", 
- "Mac-BE0E8AC46FE800CC": "11.6.3", 
+ "Mac-BE0E8AC46FE800CC": "11.6.4", 
  "Mac-00BE6ED71E35EB86": "10.15.7", 
  "Mac-4B7AC7E43945597E": "10.15.7", 
  "Mac-CAD6701F7CEA0921": "latest", 
@@ -27,12 +27,12 @@
  "Mac-FFE5EF870D7BA81A": "latest", 
  "Mac-53FDB3D8DB8CA971": "latest", 
  "Mac-A61BADE1FDAD7B05": "latest", 
- "Mac-42FD25EABCABB274": "11.6.3", 
+ "Mac-42FD25EABCABB274": "11.6.4", 
  "Mac-827FAC58A8FDFA22": "latest", 
  "Mac-1E7E29AD0135F9BC": "latest", 
- "Mac-3CBD00234E554E41": "11.6.3", 
+ "Mac-3CBD00234E554E41": "11.6.4", 
  "Mac-66F35F19FE2A0D05": "10.15.7", 
- "Mac-189A3D4F975D5FFC": "11.6.3", 
+ "Mac-189A3D4F975D5FFC": "11.6.4", 
  "Mac-B4831CEBD52A0C4C": "latest", 
  "Mac-C08A6BB70A942AC2": "10.13.6", 
  "Mac-8ED6AF5B48C039E1": "10.13.6", 
@@ -57,7 +57,7 @@
  "Mac-4B682C642B45593E": "latest", 
  "Mac-DB15BD556843C820": "latest", 
  "Mac-937A206F2EE63C01": "latest", 
- "Mac-81E3E92DD6088272": "11.6.3", 
+ "Mac-81E3E92DD6088272": "11.6.4", 
  "Mac-E43C1C25D4880AD6": "latest", 
  "Mac-942452F5819B1C1B": "10.13.6", 
  "Mac-65CE76090165799A": "latest", 
@@ -69,8 +69,8 @@
  "Mac-94245B3640C91C81": "10.13.6", 
  "Mac-EE2EBD4B90B839A8": "latest", 
  "Mac-4BC72D62AD45599E": "10.13.6", 
- "Mac-2BD1B31983FE1663": "11.6.3", 
- "Mac-7DF21CB3ED6977E5": "11.6.3", 
+ "Mac-2BD1B31983FE1663": "11.6.4", 
+ "Mac-7DF21CB3ED6977E5": "11.6.4", 
  "Mac-A369DDC4E67F1C45": "latest", 
  "Mac-94245A3940C91C80": "10.13.6", 
  "Mac-C3EC7CD22292981F": "10.15.7",