diff --git a/Dockerfile b/Dockerfile
index 5ba6108..f57989a 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -185,7 +185,7 @@ RUN touch Launch.sh \
     && tee -a Launch.sh <<< '-drive id=OpenCoreBoot,if=none,snapshot=on,format=qcow2,file=${BOOTDISK:-/home/arch/OSX-KVM/OpenCore/OpenCore.qcow2} \' \
     && tee -a Launch.sh <<< '-device ide-hd,bus=sata.2,drive=OpenCoreBoot \' \
     && tee -a Launch.sh <<< '-device ide-hd,bus=sata.3,drive=InstallMedia \' \
-    && tee -a Launch.sh <<< '-drive id=InstallMedia,if=none,file=/home/arch/OSX-KVM/BaseSystem.img,format=qcow2 \' \
+    && tee -a Launch.sh <<< '-drive id=InstallMedia,if=none,file=/home/arch/OSX-KVM/BaseSystem.img,format=raw \' \
     && tee -a Launch.sh <<< '-drive id=MacHDD,if=none,file=${IMAGE_PATH:-/home/arch/OSX-KVM/mac_hdd_ng.img},format=${IMAGE_FORMAT:-qcow2} \' \
     && tee -a Launch.sh <<< '-device ide-hd,bus=sata.4,drive=MacHDD \' \
     && tee -a Launch.sh <<< '-netdev user,id=net0,hostfwd=tcp::${INTERNAL_SSH_PORT:-10022}-:22,hostfwd=tcp::${SCREEN_SHARE_PORT:-5900}-:5900,${ADDITIONAL_PORTS} \' \