diff --git a/CHANGELOG.md b/CHANGELOG.md
index b2f4be2309..f7d924954f 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -15,6 +15,7 @@ Docs: https://docs.openclaw.ai
 
 ### Fixes
 
+- Gateway/Daemon: forward `TMPDIR` into installed service environments so macOS LaunchAgent gateway runs can open SQLite temp/journal files reliably instead of failing with `SQLITE_CANTOPEN`. (#20512) Thanks @Clawborn.
 - iOS/Screen: move `WKWebView` lifecycle ownership into `ScreenWebView` coordinator and explicit attach/detach flow to reduce gesture/lifecycle crash risk (`__NSArrayM insertObject:atIndex:` paths) during screen tab updates. (#20366) Thanks @ngutman.
 - Gateway/TUI: honor `agents.defaults.blockStreamingDefault` for `chat.send` by removing the hardcoded block-streaming disable override, so replies can use configured block-mode delivery. (#19693) Thanks @neipor.
 - Protocol/Apple: regenerate Swift gateway models for `push.test` so `pnpm protocol:check` stays green on main. Thanks @mbelinky.
diff --git a/src/daemon/launchd.test.ts b/src/daemon/launchd.test.ts
index 43222a0e29..8365879b28 100644
--- a/src/daemon/launchd.test.ts
+++ b/src/daemon/launchd.test.ts
@@ -151,6 +151,26 @@ describe("launchd install", () => {
     expect(bootstrapIndex).toBeGreaterThanOrEqual(0);
     expect(enableIndex).toBeLessThan(bootstrapIndex);
   });
+
+  it("writes TMPDIR to LaunchAgent environment when provided", async () => {
+    const env: Record<string, string | undefined> = {
+      HOME: "/Users/test",
+      OPENCLAW_PROFILE: "default",
+    };
+    const tmpDir = "/var/folders/xy/abc123/T/";
+    await installLaunchAgent({
+      env,
+      stdout: new PassThrough(),
+      programArguments: ["node", "-e", "process.exit(0)"],
+      environment: { TMPDIR: tmpDir },
+    });
+
+    const plistPath = resolveLaunchAgentPlistPath(env);
+    const plist = state.files.get(plistPath) ?? "";
+    expect(plist).toContain("<key>EnvironmentVariables</key>");
+    expect(plist).toContain("<key>TMPDIR</key>");
+    expect(plist).toContain(`<string>${tmpDir}</string>`);
+  });
 });
 
 describe("resolveLaunchAgentPlistPath", () => {
diff --git a/src/daemon/service-env.test.ts b/src/daemon/service-env.test.ts
index c9e86f7cf1..31a46c4990 100644
--- a/src/daemon/service-env.test.ts
+++ b/src/daemon/service-env.test.ts
@@ -1,3 +1,4 @@
+import os from "node:os";
 import path from "node:path";
 import { describe, expect, it } from "vitest";
 import { resolveGatewayStateDir } from "./paths.js";
@@ -282,6 +283,22 @@ describe("buildServiceEnvironment", () => {
     }
   });
 
+  it("forwards TMPDIR from the host environment", () => {
+    const env = buildServiceEnvironment({
+      env: { HOME: "/home/user", TMPDIR: "/var/folders/xw/abc123/T/" },
+      port: 18789,
+    });
+    expect(env.TMPDIR).toBe("/var/folders/xw/abc123/T/");
+  });
+
+  it("falls back to os.tmpdir when TMPDIR is not set", () => {
+    const env = buildServiceEnvironment({
+      env: { HOME: "/home/user" },
+      port: 18789,
+    });
+    expect(env.TMPDIR).toBe(os.tmpdir());
+  });
+
   it("uses profile-specific unit and label", () => {
     const env = buildServiceEnvironment({
       env: { HOME: "/home/user", OPENCLAW_PROFILE: "work" },
@@ -301,6 +318,20 @@ describe("buildNodeServiceEnvironment", () => {
     });
     expect(env.HOME).toBe("/home/user");
   });
+
+  it("forwards TMPDIR for node services", () => {
+    const env = buildNodeServiceEnvironment({
+      env: { HOME: "/home/user", TMPDIR: "/tmp/custom" },
+    });
+    expect(env.TMPDIR).toBe("/tmp/custom");
+  });
+
+  it("falls back to os.tmpdir for node services when TMPDIR is not set", () => {
+    const env = buildNodeServiceEnvironment({
+      env: { HOME: "/home/user" },
+    });
+    expect(env.TMPDIR).toBe(os.tmpdir());
+  });
 });
 
 describe("resolveGatewayStateDir", () => {
diff --git a/src/daemon/service-env.ts b/src/daemon/service-env.ts
index ec6e1a7f3b..10fd4223c8 100644
--- a/src/daemon/service-env.ts
+++ b/src/daemon/service-env.ts
@@ -1,3 +1,4 @@
+import os from "node:os";
 import path from "node:path";
 import { VERSION } from "../version.js";
 import {
@@ -212,8 +213,11 @@ export function buildServiceEnvironment(params: {
   const systemdUnit = `${resolveGatewaySystemdServiceName(profile)}.service`;
   const stateDir = env.OPENCLAW_STATE_DIR;
   const configPath = env.OPENCLAW_CONFIG_PATH;
+  // Keep a usable temp directory for supervised services even when the host env omits TMPDIR.
+  const tmpDir = env.TMPDIR?.trim() || os.tmpdir();
   return {
     HOME: env.HOME,
+    TMPDIR: tmpDir,
     PATH: buildMinimalServicePath({ env }),
     OPENCLAW_PROFILE: profile,
     OPENCLAW_STATE_DIR: stateDir,
@@ -234,8 +238,10 @@ export function buildNodeServiceEnvironment(params: {
   const { env } = params;
   const stateDir = env.OPENCLAW_STATE_DIR;
   const configPath = env.OPENCLAW_CONFIG_PATH;
+  const tmpDir = env.TMPDIR?.trim() || os.tmpdir();
   return {
     HOME: env.HOME,
+    TMPDIR: tmpDir,
     PATH: buildMinimalServicePath({ env }),
     OPENCLAW_STATE_DIR: stateDir,
     OPENCLAW_CONFIG_PATH: configPath,