From ff889ef763cfb7b7566a3c121260add5534485bb Mon Sep 17 00:00:00 2001
From: Avi Deitcher <avi@deitcher.net>
Date: Sun, 24 Sep 2017 11:18:19 +0300
Subject: [PATCH] Better error message when running qemu on macOS when --fw not
 supplied

Signed-off-by: Avi Deitcher <avi@deitcher.net>
---
 src/cmd/linuxkit/run_qemu.go | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/src/cmd/linuxkit/run_qemu.go b/src/cmd/linuxkit/run_qemu.go
index 914ba5145..637e91e64 100644
--- a/src/cmd/linuxkit/run_qemu.go
+++ b/src/cmd/linuxkit/run_qemu.go
@@ -359,6 +359,10 @@ func runQemuLocal(config QemuConfig) error {
 	// Check for OVMF firmware before running
 	if config.UEFI {
 		if config.FWPath == "" {
+			// there is no default on mac
+			if runtime.GOOS == "darwin" {
+				return fmt.Errorf("To run qemu with UEFI firmware on macOS, you must specify the path to locally installed OVMF firmware as `--fw <path>`. You can download OVMF from https://sourceforge.net/projects/edk2/files/OVMF/ ")
+			}
 			config.FWPath = defaultFWPath
 		}
 		if _, err := os.Stat(config.FWPath); err != nil {