fuse4x-kext: Add upgrade instructions to caveats

1 files changed, 12 insertions, 0 deletions

diff --git a/Library/Formula/fuse4x-kext.rb b/Library/Formula/fuse4x-kext.rb
index 30fea553c..97a1afcd3 100644
--- a/Library/Formula/fuse4x-kext.rb
+++ b/Library/Formula/fuse4x-kext.rb
@@ -36,8 +36,20 @@ class Fuse4xKext < Formula
     <<-EOS.undent
       In order for FUSE-based filesystems to work, the fuse4x kernel extension
       must be installed by the root user:
+
         sudo cp -rfX #{kext_prefix}/fuse4x.kext /System/Library/Extensions
         sudo chmod +s /System/Library/Extensions/fuse4x.kext/Support/load_fuse4x
+
+      If upgrading from a previous version of Fuse4x, the old kernel extension
+      will need to be unloaded before performing the steps listed above. First,
+      check that no FUSE-based filesystems are running:
+
+        mount | grep fuse4x
+
+      Unmount all FUSE filesystems and then unload the kernel extension:
+
+        sudo kextunload -b org.fuse4x.kext.fuse4x
+
     EOS
   end
 end