Hi everyone, If you're encountering the following error in Xcode while executing a simple webbrowser.open() command in your Python file, you're in the right place: "BUG IN CLIENT OF UIKIT: The caller of UIApplication.openURL(:) needs to migrate to the non-deprecated UIApplication.open(:options:completionHandler:). Force returning false (NO)." This issue arises because, starting from iOS 18, the UIApplication.openURL(:) method has been deprecated. If you created your project, dependencies, and the kivy-ios folder before iOS 18, every time you try to open a URL, the deprecated method will be called. To resolve this issue without rebuilding the entire project and waiting for the kivy-ios toolchain to be updated, simply follow these steps: At the very top of your main.py file remplace import webbrowser by : from pyobjus import autoclass from pyobjus.dylib_manager import load_framework load_framework('/System/Library/Frameworks/UIKit.framework') NSURL = autoclass('NSURL') UIApplication = autoclass('UIApplication') def open_url(url): nsurl = NSURL.URLWithString_(url) app = UIApplication.sharedApplication() options = {} app.openURL_options_completionHandler_(nsurl, options, None) Then replace all your webbrowser.open(url) commands by open_url(url) You no longer need webbrowser. Hope it helped.