diff --git a/test/main/features/tmux-installer/TmuxInstallerMacOsHostE2E.test.ts b/test/main/features/tmux-installer/TmuxInstallerMacOsHostE2E.test.ts
new file mode 100644
index 00000000..1dc64f39
--- /dev/null
+++ b/test/main/features/tmux-installer/TmuxInstallerMacOsHostE2E.test.ts
@@ -0,0 +1,79 @@
+/**
+ * @vitest-environment node
+ */
+
+import { execFileSync } from 'node:child_process';
+
+import { beforeAll, describe, expect, it } from 'vitest';
+
+import { TmuxStatusSourceAdapter } from '@features/tmux-installer/main/adapters/output/sources/TmuxStatusSourceAdapter';
+import { isTmuxRuntimeReadyForCurrentPlatform } from '@features/tmux-installer/main/composition/runtimeSupport';
+import { TmuxInstallStrategyResolver } from '@features/tmux-installer/main/infrastructure/installer/TmuxInstallStrategyResolver';
+import { TmuxPackageManagerResolver } from '@features/tmux-installer/main/infrastructure/platform/TmuxPackageManagerResolver';
+import { TmuxPlatformResolver } from '@features/tmux-installer/main/infrastructure/platform/TmuxPlatformResolver';
+import { buildEnrichedEnv } from '@main/utils/cliEnv';
+import { resolveInteractiveShellEnv } from '@main/utils/shellEnv';
+
+const isDarwin = process.platform === 'darwin';
+const tmuxPath = isDarwin ? tryResolveBinary('tmux') : null;
+const brewPath = isDarwin ? tryResolveBinary('brew') : null;
+
+function tryResolveBinary(command: string): string | null {
+  try {
+    return execFileSync('/usr/bin/which', [command], { encoding: 'utf8' }).trim() || null;
+  } catch {
+    return null;
+  }
+}
+
+describe.runIf(isDarwin)('tmux installer macOS host e2e', () => {
+  let env: NodeJS.ProcessEnv;
+
+  beforeAll(async () => {
+    await resolveInteractiveShellEnv();
+    env = buildEnrichedEnv();
+  });
+
+  it('resolves the current host as native macOS', async () => {
+    const result = await new TmuxPlatformResolver().resolve();
+
+    expect(result.platform).toBe('darwin');
+    expect(result.nativeSupported).toBe(true);
+    expect(result.linux).toBeNull();
+  });
+
+  it.skipIf(!brewPath)('chooses Homebrew as the macOS install strategy on this machine', async () => {
+    const result = await new TmuxInstallStrategyResolver().resolve();
+
+    expect(result.capability.strategy).toBe('homebrew');
+    expect(result.capability.supported).toBe(true);
+    expect(result.command).not.toBeNull();
+    expect(result.command?.command).toBe('brew');
+    expect(result.command?.args).toEqual(['install', 'tmux']);
+  });
+
+  it.skipIf(!tmuxPath)('finds the real tmux binary on this macOS host', async () => {
+    const resolver = new TmuxPackageManagerResolver();
+    const resolvedTmuxPath = await resolver.resolveTmuxBinary(env, 'darwin');
+
+    expect(resolvedTmuxPath).toBe(tmuxPath);
+    expect(resolvedTmuxPath).toContain('tmux');
+  });
+
+  it.skipIf(!tmuxPath)('reports tmux as runtime-ready for the live macOS host path', async () => {
+    const status = await new TmuxStatusSourceAdapter().getStatus();
+
+    expect(status.platform).toBe('darwin');
+    expect(status.host.available).toBe(true);
+    expect(status.effective.available).toBe(true);
+    expect(status.effective.location).toBe('host');
+    expect(status.effective.runtimeReady).toBe(true);
+    expect(status.host.binaryPath).toBe(tmuxPath);
+    expect(status.effective.binaryPath).toBe(tmuxPath);
+    expect(status.effective.version ?? status.host.version).toMatch(/^tmux /);
+  });
+
+  it.skipIf(!tmuxPath)('keeps the current platform on the tmux runtime path', async () => {
+    await expect(isTmuxRuntimeReadyForCurrentPlatform()).resolves.toBe(true);
+  });
+});