diff --git a/README.md b/README.md
index 7148080..0d8ca01 100644
--- a/README.md
+++ b/README.md
@@ -63,6 +63,9 @@ Devices API key section). All laptops share one key per event. Delete it after t
 
 # Update seed.json only (no .app copy — e.g. when rotating the API key):
 ./deploy/deploy.sh --seed-only all
+
+# Deploy and re-grant Accessibility permission in one pass:
+./deploy/deploy.sh --fix-accessibility all
 ```
 
 The script auto-detects each Mac's CPU architecture, copies the correct `.app` build, writes
@@ -74,6 +77,43 @@ continues, then reports which laptops need a retry.
 After the script completes, launch the app on each laptop and confirm it connects and shows
 the correct device name in the Launcher UI.
 
+### macOS Accessibility Permission
+
+The launcher sends keystrokes to PowerPoint and Keynote via AppleScript. macOS requires
+explicit **Accessibility** access for this. Every time a new `.app` binary is deployed, macOS
+invalidates the stored permission because the code signature changes — even when rsync
+updates in-place.
+
+**Symptom:** Slide control silently fails; `osascript` eventually returns a permissions error.
+
+**Manual fix** (GUI — always works):
+1. System Settings → Privacy & Security → Accessibility
+2. Find `aether_launcher` in the list → remove it (− button)
+3. Re-add it (+ button → `/Applications/aether_launcher.app`) and toggle it on
+
+**Automated fix** — use the `--fix-accessibility` deploy flag:
+```bash
+./deploy/deploy.sh --fix-accessibility 01 02 03
+./deploy/deploy.sh --build --fix-accessibility all
+```
+This runs `tccutil reset` (no password required) then attempts a direct TCC database grant
+via `sudo sqlite3`. The sqlite3 step requires NOPASSWD sudo on each Mac — one-time setup:
+
+```bash
+ssh "speaker ready"@192.168.32.1XX "sudo visudo -f /etc/sudoers.d/aether-tcc"
+```
+Add this line, then save:
+```text
+speaker ready ALL=(ALL) NOPASSWD: /usr/bin/sqlite3 /Library/Application\ Support/com.apple.TCC/TCC.db *
+```
+
+If the sqlite3 grant fails (SIP enabled, sudoers not configured), the script logs a warning
+and falls back gracefully — a fresh permission prompt appears the first time the app uses
+accessibility. The `--fix-accessibility` flag can be combined with any other flag.
+
+**Long-term fix:** Code-sign the app with an Apple Developer certificate. A stable signature
+means macOS never invalidates the permission on updates. Currently out of scope.
+
 ### Adding SSH key to a new laptop (first time only)
 
 ```bash
diff --git a/deploy/deploy.sh b/deploy/deploy.sh
index 5e3ecd4..88d2911 100755
--- a/deploy/deploy.sh
+++ b/deploy/deploy.sh
@@ -2,12 +2,14 @@
 # deploy.sh — Deploy Aether Native Launcher to onsite Mac laptops
 #
 # USAGE:
-#   ./deploy.sh <num> [num ...]           Deploy to one or more laptops (e.g. 03 04 05)
-#   ./deploy.sh all                        Deploy to all laptops in devices.conf
-#   ./deploy.sh --seed-only <num>          Update seed.json only — skip .app copy
+#   ./deploy.sh <num> [num ...]                       Deploy to one or more laptops (e.g. 03 04 05)
+#   ./deploy.sh all                                    Deploy to all laptops in devices.conf
+#   ./deploy.sh --seed-only <num>                      Update seed.json only — skip .app copy
 #   ./deploy.sh --seed-only all
-#   ./deploy.sh --build <num> [num ...]    Build first (npm run package:mac), then deploy
+#   ./deploy.sh --build <num> [num ...]                Build first (npm run package:mac), then deploy
 #   ./deploy.sh --build all
+#   ./deploy.sh --fix-accessibility <num> [num ...]    Re-grant macOS Accessibility permission after .app update
+#   ./deploy.sh --fix-accessibility all                (requires NOPASSWD sudo for sqlite3 — see README)
 #
 # REQUIRES:
 #   event.env   — copy from event.env.example and fill in AETHER_API_KEY
@@ -27,7 +29,10 @@ BUILD_DIR="$SCRIPT_DIR/../builds"
 
 SEED_ONLY=false
 BUILD_FIRST=false
+FIX_ACCESSIBILITY=false
 TARGETS=()
+# Bundle ID as embedded in Info.plist by electron-packager (no --app-bundle-id override)
+BUNDLE_ID="com.electron.aetherlauncher"
 
 usage() {
     grep '^#' "$0" | grep -v '^#!/' | sed 's/^# \{0,1\}//'
@@ -38,9 +43,10 @@ if [[ $# -eq 0 ]]; then usage; fi
 
 while [[ $# -gt 0 ]]; do
     case "$1" in
-        --seed-only) SEED_ONLY=true ;;
-        --build)     BUILD_FIRST=true ;;
-        --help|-h)   usage ;;
+        --seed-only)           SEED_ONLY=true ;;
+        --build)               BUILD_FIRST=true ;;
+        --fix-accessibility)   FIX_ACCESSIBILITY=true ;;
+        --help|-h)             usage ;;
         all)         TARGETS+=("all") ;;
         *)           TARGETS+=("$1") ;;
     esac
@@ -162,6 +168,26 @@ deploy_laptop() {
 }
 EOF
 
+    # ── Accessibility permission ───────────────────────────────────────────
+    if [[ "$FIX_ACCESSIBILITY" == "true" ]]; then
+        echo "  Resetting Accessibility permission (tccutil)..."
+        if ssh "$SSH_USER@$ip" "tccutil reset Accessibility $BUNDLE_ID" 2>/dev/null; then
+            echo "  tccutil reset OK."
+        else
+            echo "  WARNING: tccutil reset failed (non-fatal)."
+        fi
+
+        echo "  Granting Accessibility via TCC database (requires NOPASSWD sudo)..."
+        # shellcheck disable=SC2016
+        TCC_SQL="INSERT OR REPLACE INTO access(service,client,client_type,auth_value,auth_reason,auth_version) VALUES('kTCCServiceAccessibility','$BUNDLE_ID',0,2,4,1);"
+        if ssh "$SSH_USER@$ip" "sudo sqlite3 '/Library/Application Support/com.apple.TCC/TCC.db' \"$TCC_SQL\"" 2>/dev/null; then
+            echo "  ✓ Accessibility granted."
+        else
+            echo "  WARNING: TCC grant failed — manual re-authorization required."
+            echo "           See README: macOS Accessibility Permission."
+        fi
+    fi
+
     # ── Verify ─────────────────────────────────────────────────────────────
     echo "  Verifying..."
     ssh "$SSH_USER@$ip" "cat ~/seed.json"