docs(auto-updater): doc for download-progress event support (#1220)

Just a mention why electron-updater `download-progress` event is not supported on Mac yet.
electron-userland · Feb 7, 2017 · ea85810 · ea85810
1 parent a24f12c
commit ea85810
Showing 1 changed file with 1 addition and 1 deletion.
diff --git a/docs/Auto Update.md b/docs/Auto Update.md
@@ -86,7 +86,7 @@ Emitted when there is no available update.
   * `total`
   * `transferred`
 
-Emitted on progress.
+Emitted on progress. Only supported over Windows build, since `Squirrel.Mac` does not provide this data.
 
 #### Event: `update-downloaded`