diff --git a/projects/kubernetes/Makefile b/projects/kubernetes/Makefile
index b0b5b4f29..f76c47b92 100644
--- a/projects/kubernetes/Makefile
+++ b/projects/kubernetes/Makefile
@@ -4,6 +4,13 @@ KUBE_NETWORK ?= weave-v2.0.5
 INIT_YAML ?=
 INIT_YAML += network.yaml
 
+ifeq ($(shell uname -s),"Darwin")
+KUBE_FORMATS ?= iso-efi
+endif
+KUBE_FORMATS ?= iso-bios
+
+KUBE_FORMAT_ARGS := $(patsubst %,-format %,$(KUBE_FORMATS))
+
 all: build-container-images build-vm-images
 
 build-container-images:
@@ -20,10 +27,10 @@ build-vm-images: kube-master.iso kube-node.iso
 
 # NB cannot use $^ because $(INIT_YAML) is not for consumption by "moby build"
 kube-master.iso: kube.yml $(KUBE_RUNTIME).yml $(KUBE_RUNTIME)-master.yml $(INIT_YAML)
-	moby build -name kube-master -format iso-efi -format iso-bios kube.yml $(KUBE_RUNTIME).yml $(KUBE_RUNTIME)-master.yml
+	moby build -name kube-master $(KUBE_FORMAT_ARGS) kube.yml $(KUBE_RUNTIME).yml $(KUBE_RUNTIME)-master.yml
 
 kube-node.iso: kube.yml $(KUBE_RUNTIME).yml
-	moby build -name kube-node -format iso-efi -format iso-bios $^
+	moby build -name kube-node $(KUBE_FORMAT_ARGS) $^
 
 network.yaml: $(KUBE_NETWORK).yaml
 	ln -nf $< $@