diff --git a/docs/changelog.rst b/docs/changelog.rst
index bfc8967a9..d376bed28 100644
--- a/docs/changelog.rst
+++ b/docs/changelog.rst
@@ -195,6 +195,9 @@ Detailed list of changes
 - macOS: Workaround for regression in Tahoe 26.2 that breaks :option:`kitty --detach`
   (:iss:`9288`)
 
+- macOS: Workaround for yet another Tahoe regression causing macOS to start an
+  AutoFill helper process and not shut it down on application exit (:iss:`9299`)
+
 0.44.0 [2025-11-03]
 ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
 
diff --git a/glfw/cocoa_init.m b/glfw/cocoa_init.m
index 6c3bce1d0..e258c3d65 100644
--- a/glfw/cocoa_init.m
+++ b/glfw/cocoa_init.m
@@ -29,6 +29,7 @@
 #include "internal.h"
 #include "../kitty/monotonic.h"
 #include <sys/param.h> // For MAXPATHLEN
+#include <sys/sysctl.h>
 #include <pthread.h>
 
 // Needed for _NSGetProgname
@@ -417,6 +418,7 @@ - (void)application:(NSApplication *)sender openURLs:(NSArray<NSURL *> *)urls
 }
 
 static void *AppearanceObservationContext = &AppearanceObservationContext;
+static NSDate *application_finished_launching_at = nil;
 
 - (void)applicationDidFinishLaunching:(NSNotification *)notification
 {
@@ -430,6 +432,7 @@ - (void)applicationDidFinishLaunching:(NSNotification *)notification
 
     CGDisplayRegisterReconfigurationCallback(display_reconfigured, NULL);
     _glfwCocoaPostEmptyEvent();
+    application_finished_launching_at = [NSDate date];
 }
 
 GLFWAPI GLFWColorScheme glfwGetCurrentSystemColorTheme(bool query_if_unintialized) {
@@ -1009,11 +1012,47 @@ int _glfwPlatformInit(bool *supports_window_occlusion)
 
     } // autoreleasepool
 }
+static NSDate*
+get_process_start_time(pid_t pid) {
+    struct kinfo_proc kp;
+    size_t len = sizeof(kp);
+    int mib[4] = { CTL_KERN, KERN_PROC, KERN_PROC_PID, pid };
+
+    if (sysctl(mib, 4, &kp, &len, NULL, 0) == 0 && len == sizeof(kp)) {
+        struct timeval start_tv = kp.kp_proc.p_starttime;
+        time_t start_sec = start_tv.tv_sec;
+        suseconds_t start_usec = start_tv.tv_usec;
+        NSTimeInterval t = (NSTimeInterval)start_sec + ((NSTimeInterval)start_usec / 1000000.0);
+        return [NSDate dateWithTimeIntervalSince1970:t];
+    }
+    return nil;
+}
 
 void _glfwPlatformTerminate(void)
 {
     @autoreleasepool {
 
+    // Kill the AutoFill helper process that macOS Tahoe starts and fails to
+    // shutdown on application exit, see https://github.com/kovidgoyal/kitty/issues/9299
+    // Only kill helpers that were launched within a few seconds of this process to
+    // avoid killing helpers from other processes. This is obviously not robust
+    // but since Apple cant design its way out of a paper bag, it's the best we
+    // can do.
+    if (application_finished_launching_at != nil) {
+        for (NSRunningApplication *app in [[NSWorkspace sharedWorkspace] runningApplications]) {
+            if ([app.bundleIdentifier isEqualToString:@"com.apple.SafariPlatformSupport.Helper"] &&
+                [[app.localizedName lowercaseString] containsString:@"autofill (kitty)"]) {
+                NSDate *st = get_process_start_time(app.processIdentifier);
+                if (st != nil) {
+                    NSTimeInterval timeDifference = [application_finished_launching_at timeIntervalSinceDate:st];
+                    [st release];
+                    if (fabs(timeDifference) <= 5) [app forceTerminate];
+                }
+            }
+        }
+        [application_finished_launching_at release]; application_finished_launching_at = nil;
+    }
+
     _glfwClearDisplayLinks();
 
     if (_glfw.ns.inputSource)