doc: fix some darwin uninstall gaps

1 files changed, 12 insertions, 1 deletions

diff --git a/doc/manual/src/installation/installing-binary.md b/doc/manual/src/installation/installing-binary.md
index 9fb9c80c3..762402948 100644
--- a/doc/manual/src/installation/installing-binary.md
+++ b/doc/manual/src/installation/installing-binary.md
@@ -148,7 +148,8 @@ and `/etc/zshrc` which you may remove.
    This will remove all the build users that no longer serve a purpose.
 
 4. Edit fstab using `sudo vifs` to remove the line mounting the Nix Store
-   volume on `/nix`, which looks like this,
+   volume on `/nix`, which looks like
+   `UUID=<unique uuid> /nix apfs rw,noauto,nobrowse,suid,owners` or
    `LABEL=Nix\040Store /nix apfs rw,nobrowse`. This will prevent automatic
    mounting of the Nix Store volume.
 
@@ -175,6 +176,16 @@ and `/etc/zshrc` which you may remove.
    This will remove the Nix Store volume and everything that was added to the
    store.
 
+   If this command indicates that it couldn't remove the volume, your Nix Store
+   volume may not be mounted. Run the following to double-check:
+
+   ```console
+   diskutil list
+   ```
+
+   If you see a Nix Store volume, re-run the diskutil deleteVolume command, but
+   replace `/nix` with the volume's `diskXsY` identifier.
+
 > **Note**
 > 
 > After you complete the steps here, you will still have an empty `/nix`