Fixed exit status check for brew

diff --git a/util/macos_install.sh b/util/macos_install.sh
index 551b84b5aa3a2d3bb49ca9e1277caad469f0d7a8..ec8502985a0f866c9cc0769c70703544966bcec7 100755 (executable)
--- a/util/macos_install.sh
+++ b/util/macos_install.sh
@@ -1,6 +1,6 @@
 #!/bin/bash
 
-if brew --version 2>&1 > /dev/null; then
+if ! brew --version 2>&1 > /dev/null; then
        echo "Error! Homebrew not installed or broken!"
        echo -n "Would you like to install homebrew now? [y/n] "
        while read ANSWER; do