diff --git a/_data/chains/eip155-20261.json b/_data/chains/eip155-20261.json
new file mode 100644
index 000000000000..977ee0b078b6
--- /dev/null
+++ b/_data/chains/eip155-20261.json
@@ -0,0 +1,25 @@
+{
+  "name": "MACos Chain",
+  "chain": "MACOS",
+  "icon": "macos",
+  "rpc": ["https://rpc1.codeupp.xyz"],
+  "features": [{ "name": "EIP155" }, { "name": "EIP1559" }],
+  "faucets": [],
+  "nativeCurrency": {
+    "name": "MACos Coin",
+    "symbol": "MCOS",
+    "decimals": 18
+  },
+  "infoURL": "https://macosscan.codeupp.xyz",
+  "shortName": "macos",
+  "chainId": 20261,
+  "networkId": 20261,
+  "explorers": [
+    {
+      "name": "MACos Explorer",
+      "url": "https://macosscan.codeupp.xyz",
+      "icon": "macos",
+      "standard": "EIP3091"
+    }
+  ]
+}
diff --git a/_data/icons/macos.json b/_data/icons/macos.json
new file mode 100644
index 000000000000..186b9bb4e30b
--- /dev/null
+++ b/_data/icons/macos.json
@@ -0,0 +1,8 @@
+[
+  {
+    "url": "ipfs://bafkreiarmppnfhudavfbcponcp33a47idsbxz7rtg2lbgz3wtemmps3zsi",
+    "width": 512,
+    "height": 512,
+    "format": "png"
+  }
+]