diff --git a/gui/src/js/lib/client/src/index.js b/gui/src/js/lib/client/src/index.js
index a2139c05ea0..575bb2634c5 100644
--- a/gui/src/js/lib/client/src/index.js
+++ b/gui/src/js/lib/client/src/index.js
@@ -41,7 +41,11 @@ let optParser = yargs
     .help()
     .version(false)
     .parserConfiguration({'populate--':true})
-    .strict()
+//  FIXME [MM]
+//  This modifier crashes Enso Studio on macOS 11, To test if it works 
+//  again in next macOS betas - temporarily solves #650
+//  https://github.com/yargs/yargs/issues/1688
+//  .strict()
 
 
 // === Config Options ===