![Apple Begins Warning Users That 'Legacy System Extensions' Won't Work With a Future Version of macOS - MacRumors Apple Begins Warning Users That 'Legacy System Extensions' Won't Work With a Future Version of macOS - MacRumors](https://images.macrumors.com/t/6Rgwf4la3kNxHt17-FUuTl5XbHc=/1600x1200/smart/article-new/2020/03/macos-catalina-legacy-system-extension-alert.jpg)
Apple Begins Warning Users That 'Legacy System Extensions' Won't Work With a Future Version of macOS - MacRumors
![Help Center - Little Snitch - macOS 10.15.4 shows message that a “Legacy System Extension” will be incompatible with a future version of macOS Help Center - Little Snitch - macOS 10.15.4 shows message that a “Legacy System Extension” will be incompatible with a future version of macOS](https://www.obdev.at/Images/faq/o5awi-legacy-system-extension@2x.png)
Help Center - Little Snitch - macOS 10.15.4 shows message that a “Legacy System Extension” will be incompatible with a future version of macOS
![Le message d'extension du système existant s'affiche lors de l'exécution du client Netskope version 77 ou ultérieure sur macOS 10.5.4 ou version ultérieure | Dell Maroc Le message d'extension du système existant s'affiche lors de l'exécution du client Netskope version 77 ou ultérieure sur macOS 10.5.4 ou version ultérieure | Dell Maroc](https://supportkb.dell.com/img/ka06P0000008PX9QAM/ka06P0000008PX9QAM_fr_1.jpeg)
Le message d'extension du système existant s'affiche lors de l'exécution du client Netskope version 77 ou ultérieure sur macOS 10.5.4 ou version ultérieure | Dell Maroc
Keep getting Legacy System Warning but can't find the extension (from developer Matt Ingalls) | MacRumors Forums
![MacOS/Catalina/v10.15.4 -Slow/No Scans; Extensions not compatible | Trend Micro Home Users Community MacOS/Catalina/v10.15.4 -Slow/No Scans; Extensions not compatible | Trend Micro Home Users Community](https://prod-content-care-community-cdn.sprinklr.com/e3524b58-3f1e-4dbc-8cf7-704e4fc87dec/ScreenShot20200425at10.12.23AM-1387733e-5b13-4511-b645-4e3146b372f5-763055522.png)