Add macOS hint & more FAQs to README

README.md

@@ -67,6 +67,11 @@ To run Janice just download and unzip the latest release to your computer. Janic
 1. Unzip the file into a directory of your choice
 1. Run the .app file to start the app.
 
+> [!TIP]
+> MacOS may report this app incorrectly as "damaged", because it is not signed with an Apple certificate. You can remove this error by opening a terminal and running the following command. For more information please see [Fyne Troubleshooting](https://docs.fyne.io/faq/troubleshoot#distribution):
+>
+> ```sudo xattr -r -d com.apple.quarantine Janice.app```
+
 ### Build and run from repository
 
 If your system is configured to build [Fyne](https://fyne.io/) apps, you can build and run this app directly from the repository with the following command:
@@ -85,6 +90,10 @@ The largest JSON file you can load on your computer depends mainly on how much R
 
 For comparison we did a load test on one of our developer notebooks. It has 8 GB RAM and runs Ubuntu 22.04 LTS. We were able to load a JSON files successfully with up to 45 million elements. The size of our test file was about 2.5 GB.
 
+## Are JSON files formatted?
+
+Yes. The JSON document is rendered as tree and keys are shown in alphabetical order.
+
 ## Attributions
 
 - [Json icons created by LAB Design Studio - Flaticon](https://www.flaticon.com/free-icons/json)