diff --git a/native/macos/window-effects.mm b/native/macos/window-effects.mm
index 04ddaacb..a9283b1b 100644
--- a/native/macos/window-effects.mm
+++ b/native/macos/window-effects.mm
@@ -513,3 +513,104 @@ extern "C" bool setNativeWindowDragRegion(void *windowPtr, double x,
 
   return success;
 }
+
+@interface ElectrobunDockProgressView : NSView
+@property(nonatomic) double progress;
+@property(nonatomic) int state;
+@end
+
+@implementation ElectrobunDockProgressView
+@synthesize progress = _progress;
+@synthesize state = _state;
+
+- (NSColor *)fillColor {
+  switch (self.state) {
+    case 1:
+      return [NSColor systemRedColor];
+    case 2:
+      return [NSColor systemYellowColor];
+    default:
+      if (@available(macOS 10.14, *)) {
+        return [NSColor controlAccentColor];
+      }
+      return [NSColor systemBlueColor];
+  }
+}
+
+- (void)drawRect:(NSRect)dirtyRect {
+  (void)dirtyRect;
+
+  NSRect bounds = [self bounds];
+  [[NSApp applicationIconImage] drawInRect:bounds
+                                  fromRect:NSZeroRect
+                                 operation:NSCompositingOperationSourceOver
+                                  fraction:1.0];
+
+  CGFloat inset = round(bounds.size.width * 0.14);
+  CGFloat height = round(bounds.size.height * 0.11);
+  NSRect track =
+      NSMakeRect(NSMinX(bounds) + inset, NSMinY(bounds) + round(height * 0.9),
+                 bounds.size.width - inset * 2.0, height);
+  CGFloat radius = height / 2.0;
+
+  NSBezierPath *trackPath = [NSBezierPath bezierPathWithRoundedRect:track
+                                                            xRadius:radius
+                                                            yRadius:radius];
+  [[NSColor colorWithWhite:0.0 alpha:0.55] setFill];
+  [trackPath fill];
+
+  double fraction = MIN(1.0, MAX(0.0, self.progress));
+  if (fraction > 0.0) {
+    NSRect fill = NSInsetRect(track, 1.5, 1.5);
+    CGFloat fillRadius = fill.size.height / 2.0;
+    fill.size.width = MAX(fill.size.height, fill.size.width * fraction);
+    [[self fillColor] setFill];
+    [[NSBezierPath bezierPathWithRoundedRect:fill
+                                     xRadius:fillRadius
+                                     yRadius:fillRadius] fill];
+  }
+
+  [[NSColor colorWithWhite:1.0 alpha:0.85] setStroke];
+  NSBezierPath *outline =
+      [NSBezierPath bezierPathWithRoundedRect:NSInsetRect(track, 0.5, 0.5)
+                                      xRadius:radius - 0.5
+                                      yRadius:radius - 0.5];
+  outline.lineWidth = 1.0;
+  [outline stroke];
+}
+@end
+
+// fraction < 0 removes the progress bar; state: 0 normal, 1 error, 2 paused.
+extern "C" bool setDockProgress(double fraction, int state) {
+  dispatch_async(dispatch_get_main_queue(), ^{
+    NSDockTile *dockTile = [NSApp dockTile];
+    if (dockTile == nil) {
+      return;
+    }
+
+    if (fraction < 0.0) {
+      if ([dockTile contentView] != nil) {
+        [dockTile setContentView:nil];
+        [dockTile display];
+      }
+      return;
+    }
+
+    ElectrobunDockProgressView *view = nil;
+    if ([[dockTile contentView]
+            isKindOfClass:[ElectrobunDockProgressView class]]) {
+      view = (ElectrobunDockProgressView *)[dockTile contentView];
+    } else {
+      NSSize size = [dockTile size];
+      view = [[ElectrobunDockProgressView alloc]
+          initWithFrame:NSMakeRect(0, 0, size.width, size.height)];
+      [dockTile setContentView:view];
+    }
+
+    view.progress = fraction;
+    view.state = state;
+    [dockTile display];
+  });
+
+  return true;
+}
diff --git a/src/components/Dashboard/common/LiveActivities.jsx b/src/components/Dashboard/common/LiveActivities.jsx
index ee49df54..a6c77a5a 100644
--- a/src/components/Dashboard/common/LiveActivities.jsx
+++ b/src/components/Dashboard/common/LiveActivities.jsx
@@ -13,6 +13,7 @@ import { theme, Popover } from 'antd'
 import { useNavigate } from 'react-router-dom'
 import { ApiServerContext } from '../context/ApiServerContext'
 import { AuthContext } from '../context/AuthContext'
+import { ElectronContext } from '../context/ElectronContext'
 import { getModelByName } from '../../../database/ObjectModels'
 import { getStateTagInfo } from '../utils/Utils'
 import SpotlightTooltip from './SpotlightTooltip'
@@ -259,6 +260,7 @@ const LiveActivities = () => {
     subscribeToObjectTypeUpdates,
     subscribeToObjectUpdates
   } = useContext(ApiServerContext)
+  const { isElectron, setAppProgress } = useContext(ElectronContext)
   const [watched, setWatched] = useState([])
 
   const userId = userProfile?._id
@@ -496,6 +498,26 @@ const LiveActivities = () => {
 
   useEffect(() => () => restoreLiveFavicon(), [])
 
+  const appProgressPercent = faviconActivity?.percent ?? null
+  const appProgressStatus = faviconActivity?.status ?? null
+  const setAppProgressRef = useRef(setAppProgress)
+  setAppProgressRef.current = setAppProgress
+
+  useEffect(() => {
+    if (!isElectron) return
+    void setAppProgressRef.current({
+      percent: appProgressPercent,
+      status: appProgressStatus
+    })
+  }, [isElectron, appProgressPercent, appProgressStatus])
+
+  useEffect(() => {
+    if (!isElectron) return undefined
+    return () => {
+      void setAppProgressRef.current({ percent: null })
+    }
+  }, [isElectron])
+
   useEffect(() => {
     const seq = ++faviconCaptureSeq.current
     let cancelled = false
diff --git a/src/components/Dashboard/context/ElectronContext.jsx b/src/components/Dashboard/context/ElectronContext.jsx
index 5ab2e26a..e10561f6 100644
--- a/src/components/Dashboard/context/ElectronContext.jsx
+++ b/src/components/Dashboard/context/ElectronContext.jsx
@@ -365,6 +365,15 @@ const ElectronProvider = ({ children }) => {
     [electronAvailable]
   )
 
+  const setAppProgress = useCallback(
+    async (progress) => {
+      if (!electronAvailable) return false
+      const result = await desktopBridge.setAppProgress(progress)
+      return result?.ok ?? false
+    },
+    [electronAvailable]
+  )
+
   const getElectronVersion = useCallback(async () => {
     if (!electronAvailable) return null
     return await desktopBridge.getAppVersion()
@@ -402,6 +411,7 @@ const ElectronProvider = ({ children }) => {
         setToken,
         resizeSpotlightWindow,
         setSidebarViewMenu,
+        setAppProgress,
         getElectronVersion,
         getAppEngine,
         registerTabHistoryHandler,
diff --git a/src/desktop/app-progress.js b/src/desktop/app-progress.js
new file mode 100644
index 00000000..3529737b
--- /dev/null
+++ b/src/desktop/app-progress.js
@@ -0,0 +1,69 @@
+import { setMacDockProgress } from './macos-window-effects.js'
+import {
+  setWindowsTaskbarProgress,
+  TASKBAR_STATE
+} from './windows-taskbar-progress.js'
+
+const MAC_DOCK_STATE = { normal: 0, error: 1, paused: 2 }
+
+const reports = new Map()
+
+function progressState(status) {
+  if (status === 'error') return 'error'
+  if (status === 'warning') return 'paused'
+  return 'normal'
+}
+
+function normalizeProgress({ percent, status } = {}) {
+  const value = Number(percent)
+  if (percent == null || !Number.isFinite(value)) return null
+  return {
+    fraction: Math.min(100, Math.max(0, value)) / 100,
+    state: progressState(status)
+  }
+}
+
+function applyDockProgress() {
+  let best = null
+  for (const report of reports.values()) {
+    if (report.progress && (!best || report.progress.fraction > best.fraction)) {
+      best = report.progress
+    }
+  }
+  setMacDockProgress(
+    best ? best.fraction : null,
+    best ? MAC_DOCK_STATE[best.state] : 0
+  )
+}
+
+export function setAppProgress(windowId, window, progress) {
+  const normalized = normalizeProgress(progress)
+
+  if (normalized) {
+    reports.set(windowId, { window, progress: normalized })
+  } else {
+    reports.delete(windowId)
+  }
+
+  if (process.platform === 'darwin') {
+    applyDockProgress()
+    return true
+  }
+
+  if (process.platform === 'win32') {
+    return setWindowsTaskbarProgress(
+      window?.ptr,
+      normalized?.fraction ?? null,
+      TASKBAR_STATE[normalized?.state ?? 'normal']
+    )
+  }
+
+  return false
+}
+
+export function clearAppProgress(windowId) {
+  if (!reports.delete(windowId)) return
+  if (process.platform === 'darwin') {
+    applyDockProgress()
+  }
+}
diff --git a/src/desktop/macos-window-effects.js b/src/desktop/macos-window-effects.js
index aafa3ccd..883f4b59 100644
--- a/src/desktop/macos-window-effects.js
+++ b/src/desktop/macos-window-effects.js
@@ -45,7 +45,17 @@ function resolveDylibPath() {
   return null
 }
 
+let loadedLibrary
+
 function loadMacWindowEffectsLibrary() {
+  if (loadedLibrary !== undefined) {
+    return loadedLibrary
+  }
+  loadedLibrary = openMacWindowEffectsLibrary()
+  return loadedLibrary
+}
+
+function openMacWindowEffectsLibrary() {
   const dylibPath = resolveDylibPath()
   if (!dylibPath) {
     console.warn(
@@ -77,6 +87,10 @@ function loadMacWindowEffectsLibrary() {
         setNativeWindowDragRegion: {
           args: [FFIType.ptr, FFIType.f64, FFIType.f64],
           returns: FFIType.bool
+        },
+        setDockProgress: {
+          args: [FFIType.f64, FFIType.i32],
+          returns: FFIType.bool
         }
       })
     }
@@ -104,6 +118,28 @@ function applyTrafficLightsPosition(lib, mainWindow, attempt = 0) {
   return false
 }
 
+// fraction is 0..1, or null to remove the bar; state: 0 normal, 1 error, 2 paused.
+export function setMacDockProgress(fraction, state = 0) {
+  if (process.platform !== 'darwin') {
+    return false
+  }
+
+  const loaded = loadMacWindowEffectsLibrary()
+  if (!loaded?.lib.symbols.setDockProgress) {
+    return false
+  }
+
+  try {
+    return loaded.lib.symbols.setDockProgress(
+      fraction == null ? -1 : fraction,
+      state
+    )
+  } catch (error) {
+    console.warn('macOS dock progress: failed to update dock tile:', error)
+    return false
+  }
+}
+
 export function applyMacOSWindowEffects(mainWindow) {
   if (process.platform !== 'darwin' || !mainWindow?.ptr) {
     return
diff --git a/src/desktop/rpc.js b/src/desktop/rpc.js
index 43cc91bc..be431c36 100644
--- a/src/desktop/rpc.js
+++ b/src/desktop/rpc.js
@@ -1,4 +1,5 @@
 import { BrowserView } from 'electrobun/bun'
+import { setAppProgress } from './app-progress.js'
 import {
   checkForCompletedUpdate,
   getRunningAppVersion,
@@ -20,7 +21,9 @@ import {
 } from './store.js'
 import {
   createAppWindow,
+  getFocusedWindowId,
   getMainWindow,
+  getWindowById,
   getWindowSession,
   getWindowState,
   handleWindowControl,
@@ -103,6 +106,15 @@ export function createAppRpc() {
     setSidebarViewMenu: async ({ sections }) => ({
       ok: setSidebarViewMenu(sections)
     }),
+    setAppProgress: async ({ windowId, percent, status } = {}) => {
+      const targetWindowId = windowId || getFocusedWindowId()
+      return {
+        ok: setAppProgress(targetWindowId, getWindowById(targetWindowId), {
+          percent,
+          status
+        })
+      }
+    },
     checkAppUpdateResult: async () =>
       checkForCompletedUpdate(getMainWindow()),
     checkDuplicateInstallations: async () => checkForDuplicateInstallations(),
diff --git a/src/desktop/window.js b/src/desktop/window.js
index 058b988a..5ad7e1c3 100644
--- a/src/desktop/window.js
+++ b/src/desktop/window.js
@@ -1,4 +1,5 @@
 import Electrobun, { BrowserWindow, Updater, Utils } from 'electrobun/bun'
+import { clearAppProgress } from './app-progress.js'
 import { applyApplicationMenu, setupApplicationMenuEvents } from './menu.js'
 import {
   applyMacOSWindowEffects,
@@ -447,6 +448,7 @@ function setupWindowEvents(window, windowId) {
   })
   window.on?.('close', () => {
     captureWindowLayout(windowId)
+    clearAppProgress(windowId)
     windows.delete(windowId)
     if (focusedWindowId === windowId) {
       focusedWindowId = getFocusedWindowId()
diff --git a/src/desktop/windows-taskbar-progress.js b/src/desktop/windows-taskbar-progress.js
new file mode 100644
index 00000000..0b590bdd
--- /dev/null
+++ b/src/desktop/windows-taskbar-progress.js
@@ -0,0 +1,142 @@
+import { CFunction, dlopen, FFIType, ptr, read } from 'bun:ffi'
+
+const CLSID_TASKBAR_LIST = '56FDF344-FD6D-11D0-958A-006097C9A090'
+const IID_ITASKBAR_LIST3 = 'EA1AFB91-9E28-4B86-90E9-9E9F8A5EEDAF'
+const COINIT_APARTMENTTHREADED = 0x2
+const CLSCTX_INPROC_SERVER = 0x1
+const RPC_E_CHANGED_MODE = 0x80010106 | 0
+
+// ITaskbarList3 vtable slots (IUnknown 0-2, ITaskbarList 3-7, ITaskbarList2 8).
+const VTABLE_HR_INIT = 3
+const VTABLE_SET_PROGRESS_VALUE = 9
+const VTABLE_SET_PROGRESS_STATE = 10
+
+export const TASKBAR_STATE = {
+  none: 0x0,
+  indeterminate: 0x1,
+  normal: 0x2,
+  error: 0x4,
+  paused: 0x8
+}
+
+const PROGRESS_TOTAL = 1000n
+
+let taskbar
+
+function guidBuffer(guid) {
+  const hex = guid.replace(/-/g, '')
+  const buffer = Buffer.alloc(16)
+  buffer.writeUInt32LE(parseInt(hex.slice(0, 8), 16), 0)
+  buffer.writeUInt16LE(parseInt(hex.slice(8, 12), 16), 4)
+  buffer.writeUInt16LE(parseInt(hex.slice(12, 16), 16), 6)
+  Buffer.from(hex.slice(16), 'hex').copy(buffer, 8)
+  return buffer
+}
+
+function vtableMethod(object, slot, args) {
+  const vtable = read.ptr(object, 0)
+  return CFunction({
+    ptr: read.ptr(vtable, slot * 8),
+    args: [FFIType.ptr, ...args],
+    returns: FFIType.i32
+  })
+}
+
+function createTaskbarList() {
+  const ole32 = dlopen('ole32.dll', {
+    CoInitializeEx: { args: [FFIType.ptr, FFIType.u32], returns: FFIType.i32 },
+    CoCreateInstance: {
+      args: [FFIType.ptr, FFIType.ptr, FFIType.u32, FFIType.ptr, FFIType.ptr],
+      returns: FFIType.i32
+    }
+  })
+
+  const initResult = ole32.symbols.CoInitializeEx(null, COINIT_APARTMENTTHREADED)
+  if (initResult < 0 && initResult !== RPC_E_CHANGED_MODE) {
+    throw new Error(`CoInitializeEx failed (0x${(initResult >>> 0).toString(16)})`)
+  }
+
+  const clsid = guidBuffer(CLSID_TASKBAR_LIST)
+  const iid = guidBuffer(IID_ITASKBAR_LIST3)
+  const out = new BigUint64Array(1)
+  const createResult = ole32.symbols.CoCreateInstance(
+    ptr(clsid),
+    null,
+    CLSCTX_INPROC_SERVER,
+    ptr(iid),
+    ptr(out)
+  )
+  if (createResult < 0 || !out[0]) {
+    throw new Error(
+      `CoCreateInstance(TaskbarList) failed (0x${(createResult >>> 0).toString(16)})`
+    )
+  }
+
+  const object = Number(out[0])
+  const hrInit = vtableMethod(object, VTABLE_HR_INIT, [])
+  const initTaskbarResult = hrInit(object)
+  if (initTaskbarResult < 0) {
+    throw new Error(
+      `ITaskbarList3.HrInit failed (0x${(initTaskbarResult >>> 0).toString(16)})`
+    )
+  }
+
+  return {
+    object,
+    setProgressValue: vtableMethod(object, VTABLE_SET_PROGRESS_VALUE, [
+      FFIType.ptr,
+      FFIType.u64,
+      FFIType.u64
+    ]),
+    setProgressState: vtableMethod(object, VTABLE_SET_PROGRESS_STATE, [
+      FFIType.ptr,
+      FFIType.u32
+    ])
+  }
+}
+
+function getTaskbarList() {
+  if (taskbar !== undefined) {
+    return taskbar
+  }
+
+  try {
+    taskbar = createTaskbarList()
+  } catch (error) {
+    console.warn('Windows taskbar progress unavailable:', error)
+    taskbar = null
+  }
+  return taskbar
+}
+
+// fraction is 0..1, or null to remove the bar.
+export function setWindowsTaskbarProgress(
+  hwnd,
+  fraction,
+  state = TASKBAR_STATE.normal
+) {
+  if (process.platform !== 'win32' || !hwnd) {
+    return false
+  }
+
+  const list = getTaskbarList()
+  if (!list) {
+    return false
+  }
+
+  try {
+    if (fraction == null) {
+      return list.setProgressState(list.object, hwnd, TASKBAR_STATE.none) >= 0
+    }
+
+    const completed = BigInt(
+      Math.round(Math.min(1, Math.max(0, fraction)) * Number(PROGRESS_TOTAL))
+    )
+    // SetProgressValue resets the state to normal, so the state goes second.
+    list.setProgressValue(list.object, hwnd, completed, PROGRESS_TOTAL)
+    return list.setProgressState(list.object, hwnd, state) >= 0
+  } catch (error) {
+    console.warn('Windows taskbar progress: failed to update:', error)
+    return false
+  }
+}
diff --git a/src/electrobun-bridge.js b/src/electrobun-bridge.js
index e77029ec..7f36e64c 100644
--- a/src/electrobun-bridge.js
+++ b/src/electrobun-bridge.js
@@ -263,6 +263,7 @@ const electronAPI = {
     invokeRequest('resizeSpotlightWindow', { height }),
   setSidebarViewMenu: (sections) =>
     invokeRequest('setSidebarViewMenu', { sections }),
+  setAppProgress: (progress) => invokeRequest('setAppProgress', progress),
   getAppVersion: () => invokeRequest('getAppVersion'),
   getAppEngine: () => invokeRequest('getAppEngine'),
   syncWindowTabs: (payload) => invokeRequest('syncWindowTabs', payload),