diff --git a/src/borg/archiver.py b/src/borg/archiver.py
index 82ad00e13..1481d5188 100644
--- a/src/borg/archiver.py
+++ b/src/borg/archiver.py
@@ -3448,13 +3448,13 @@ class Archiver:
         The ``-x`` or ``--one-file-system`` option excludes directories, that are mountpoints (and everything in them).
         It detects mountpoints by comparing the device number from the output of ``stat()`` of the directory and its
         parent directory. Specifically, it excludes directories for which ``stat()`` reports a device number different
-        from the device number of their parent. Be aware that in Linux (and possibly elsewhere) there are directories
-        with device number different from their parent, which the kernel does not consider a mountpoint and also the
-        other way around. Examples are bind mounts (possibly same device number, but always a mountpoint) and ALL
-        subvolumes of a btrfs (different device number from parent but not necessarily a mountpoint). Therefore when
-        using ``--one-file-system``, one should make doubly sure that the backup works as intended especially when using
-        btrfs. This is even more important, if the btrfs layout was created by someone else, e.g. a distribution
-        installer.
+        from the device number of their parent.
+        In general: be aware that there are directories with device number different from their parent, which the kernel
+        does not consider a mountpoint and also the other way around.
+        Linux examples for this are bind mounts (possibly same device number, but always a mountpoint) and ALL
+        subvolumes of a btrfs (different device number from parent but not necessarily a mountpoint).
+        macOS examples are the apfs mounts of a typical macOS installation.
+        Therefore, when using ``--one-file-system``, you should double-check that the backup works as intended.
 
 
         .. _list_item_flags:
@@ -3580,7 +3580,8 @@ class Archiver:
 
         fs_group = subparser.add_argument_group('Filesystem options')
         fs_group.add_argument('-x', '--one-file-system', dest='one_file_system', action='store_true',
-                              help='stay in the same file system and do not store mount points of other file systems.  This might behave different from your expectations, see the docs.')
+                              help='stay in the same file system and do not store mount points of other file systems - '
+                              'this might behave different from your expectations, see the description below.')
         fs_group.add_argument('--numeric-owner', dest='numeric_ids', action='store_true',
                               help='deprecated, use ``--numeric-ids`` instead')
         fs_group.add_argument('--numeric-ids', dest='numeric_ids', action='store_true',