chore(docs): update some small sections in README

Author: eliandoran

README.md

@@ -16,7 +16,7 @@ See [screenshots](https://triliumnext.github.io/Docs/Wiki/screenshot-tour) for q
 
 ### Migrating from Trilium?
 
-There are no special migration steps to migrate from a zadam/Trilium instance to a TriliumNext/Notes instance. Just upgrade your Trilium instance to the latest version and [install TriliumNext/Notes as usual](#-installation)
+There are no special migration steps to migrate from a zadam/Trilium instance to a TriliumNext/Notes instance. Simply [install TriliumNext/Notes](#-installation) as usual and it will use your existing database.
 
 Versions up to and including [v0.90.4](https://github.com/TriliumNext/Notes/releases/tag/v0.90.4) are compatible with the latest zadam/trilium version of [v0.63.7](https://github.com/zadam/trilium/releases/tag/v0.63.7). Any later versions of TriliumNext have their sync versions incremented.
 
@@ -66,17 +66,7 @@ To use TriliumNext on your desktop machine (Linux, MacOS, and Windows) you have
 * Download the binary release for your platform from the [latest release page](https://github.com/TriliumNext/Notes/releases/latest), unzip the package and run the ```trilium``` executable.
 * Access TriliumNext via the web interface of a server installation (see below)
     * Currently only the latest versions of Chrome & Firefox are supported (and tested).
-* (Coming Soon) TriliumNext will also be provided as a Flatpak
-
-#### MacOS
-Currently when running TriliumNext/Notes on MacOS, you may get the following error:
-> Apple could not verify "TriliumNext Notes" is free of malware and may harm your Mac or compromise your privacy.
-
-You will need to run the command on your shell to resolve the error (documented [here](https://github.com/TriliumNext/Notes/issues/329#issuecomment-2287164137)):
-
-```bash
-xattr -c "/path/to/Trilium Next.app"
-```
+* TriliumNext is also provided as a Flatpak, but not yet published on FlatHub.
 
 ### Mobile