diff --git a/README.md b/README.md
index cdb3709f..1d464916 100644
--- a/README.md
+++ b/README.md
@@ -243,6 +243,27 @@ signal, e.g.
 
 and then inspect the logs.
 
+## Installation with Boot2Docker
+
+If you are running Docker inside the Boot2Docker VM, e.g. because you are 
+on a Mac, then the following changes are required to these instructions:
+
+Assuming you have fetched the 'weave' script via curl or similar, and it 
+is in the current directory, transfer it to the Boot2Docker VM and make it 
+executable like this:
+
+    host1$ boot2docker ssh "cat > weave" < weave
+    host1$ boot2docker ssh "chmod a+x weave"
+
+Then, if we were trying to create the same containers as in the first example 
+above, the launch command would be run like this:
+
+    host1$ WEAVE=$(boot2docker ssh "sudo ./weave launch 10.0.0.1/16")
+
+and the run command like this:
+
+    host1# C=$(boot2docker ssh "sudo ./weave run 10.0.1.1/24 -t -i debian /bin/bash")
+
 ## Building
 
 (NB. This is only necessary if you want to work on weave. Also, these
diff --git a/weaver/weave b/weaver/weave
index 2e97b726..e6bd3143 100755
--- a/weaver/weave
+++ b/weaver/weave
@@ -87,7 +87,12 @@ ip netns exec $NSPID ip link set $GUEST_IFNAME name $CONTAINER_IFNAME
 ip netns exec $NSPID ip addr add $IPADDR dev $CONTAINER_IFNAME
 ip netns exec $NSPID ip link set $CONTAINER_IFNAME up
 
-ip netns exec $NSPID ethtool -K $IFACE tx off > /dev/null
+if [ command -v ethtool >/dev/null 2>&1 ]
+then
+    ip netns exec $NSPID ethtool -K $IFACE tx off > /dev/null
+else
+    echo "Cannot find ethtool; continuing without it" >&2
+fi
 
 [ -f /var/run/netns/$NSPID ] && rm -f /var/run/netns/$NSPID