diff --git a/.github/workflows/master_build.yml b/.github/workflows/master_build.yml
index 1200e77754..24e91a740c 100644
--- a/.github/workflows/master_build.yml
+++ b/.github/workflows/master_build.yml
@@ -124,6 +124,9 @@ jobs:
           echo "Downloading MacOSX10.12 SDK.."
           curl --progress-bar -L -o macOS_SDK10.12.4.tar.xz "https://cloudflare-ipfs.com/ipfs/QmTDLEYdo616YgZKSYC2mySSw8EKQWTz7CH8UyMupMBpzK?filename=macOS_SDK10.12.4.tar.xz" || exit 1
           echo "  done\n"
+          echo "Checking MacOSX10.12 SDK.."
+          echo "c00e03cb64bed8d0d75d7a01c93de094b6ffaa3bc3318e7b29a9bdc354f0e29e363c454b7db89db8a3b78e9702668d1c661f1af279807de8db11accecb0ca498  macOS_SDK10.12.4.tar.xz" >> macOS_SDK10.12.4.tar.xz.checksum
+          shasum -a 512 -w -c macOS_SDK10.12.4.tar.xz.checksum
           echo "Extracting MacOSX10.12 SDK.."
           tar -xf macOS_SDK10.12.4.tar.xz || exit 1
           echo "  done\n"
diff --git a/.github/workflows/pr_build.yml b/.github/workflows/pr_build.yml
index 87225ec15d..05e8717ed1 100644
--- a/.github/workflows/pr_build.yml
+++ b/.github/workflows/pr_build.yml
@@ -158,6 +158,9 @@ jobs:
           echo "Downloading MacOSX10.12 SDK.."
           curl --progress-bar -L -o macOS_SDK10.12.4.tar.xz "https://cloudflare-ipfs.com/ipfs/QmTDLEYdo616YgZKSYC2mySSw8EKQWTz7CH8UyMupMBpzK?filename=macOS_SDK10.12.4.tar.xz" || exit 1
           echo "  done\n"
+          echo "Checking MacOSX10.12 SDK.."
+          echo "c00e03cb64bed8d0d75d7a01c93de094b6ffaa3bc3318e7b29a9bdc354f0e29e363c454b7db89db8a3b78e9702668d1c661f1af279807de8db11accecb0ca498  macOS_SDK10.12.4.tar.xz" >> macOS_SDK10.12.4.tar.xz.checksum
+          shasum -a 512 -w -c macOS_SDK10.12.4.tar.xz.checksum
           echo "Extracting MacOSX10.12 SDK.."
           tar -xf macOS_SDK10.12.4.tar.xz || exit 1
           echo "  done\n"