Update

lua/plugins/default/neotree.lua

@@ -0,0 +1,22 @@
+return {
+  {
+    "nvim-neo-tree/neo-tree.nvim",
+    lazy = true,
+    opts = {
+      filesystem = {
+        window = {
+          mappings = {
+            ["o"] = "system_open",
+          },
+        },
+        commands = {
+          system_open = function(state)
+            local node = state.tree:get_node()
+            local path = node:get_id()
+            vim.api.nvim_command("silent !open -g " .. path)
+          end,
+        },
+      },
+    },
+  },
+}