This is a compatibility issue with a 3rd party application and macOS 27.0.1. It is the developer's responsibility to keep their application(s) up to date and compatible with current versions of macOS (which is why there is a beta testing program for developers).
You need to contact the developer of the app, inform them of the issue, and wait for them to release a fix.
See the following from Apple: How to contact an app developer - Apple Support
GSE Smart IPTV Pro is an abandoned legacy app that has not been updated for 2 years.
The version on the App Store (v4.4) was built explicitly for tvOS / iOS. It only runs on your MacBook and iMac because Apple Silicon Macs can run unmodified iPad/iPhone apps. When a major macOS update changes underlying system frameworks, older iOS apps running on macOS frequently stop responding to click navigation, playlist parsing, or file browsing.
Because the developer (droidvision) appear to be no longer actively updating the software, you will need to try a few workarounds or migrate to a supported macOS alternative.
Grant Full Disk Access
Sometimes, a macOS upgrade resets privacy permissions, preventing older iOS apps from reading local data databases or network caches.
- Click the Apple Menu in the top left and open System Settings.
- Navigate to Privacy & Security > Full Disk Access.
- Look for GSE Smart IPTV Pro in the list and toggle the switch to On.
- If it isn't listed, click the + icon at the bottom, find the app in your Applications folder, and add it manually.
- Fully restart the app and try opening your playlists.
Use Alternative App Navigation
Since double-clicking is broken, the app's tap-gesture translation layer is failing. Try these alternative input methods to bypass the double-click bug:
- The Return Key: Click the playlist once to highlight it, then press Enter / Return on your keyboard.
- Right-Click Menu: Right-click (or two-finger tap) the playlist to see if a contextual "Open" or "Browse" menu appears.
- The Web Interface: GSE IPTV has a built-in web server. Go to the app's settings, turn on GSE Web Tools, and use a web browser on your Mac (like Safari or Chrome) to manage, upload, or trigger your playlists.
Migrate to a Native macOS IPTV Player
Because GSE Smart IPTV Pro is obsolete, the best long-term solution is migrating to a native macOS player. These applications are optimized for macOS 27 and will natively accept your existing M3U local files or remote URLs:
- Iptvnator (Highly Recommended): A free, open-source, and highly modern IPTV player built for desktop operating systems. It handles heavy M3U playlists and remote URLs seamlessly.
- VLC Media Player: The ultimate open-source cross-platform media player. You can simply go to File > Open Network and paste your remote playlist URL, or drag and drop your local M3U file straight into the VLC window.
- LilyPlayer or Troypoint: Native Mac App Store alternatives designed specifically for desktop viewports.