Comments (2)
I myself see the following error
-bash: declare: -A: invalid option
from dev-shell-essentials.
I'm a little late to the party but like OP stated you will need the GNU version of sed and an updated version of bash. The sed -u flag lets the screen refresh faster by flushing the buffers faster and loading as little data into buffers (I believe). The declare -A flag allows you to declare associative arrays.
You'll need to run brew install bash
and brew install gnu-sed
in a command prompt. Then alter the script to use gsed that you just installed instead of sed that is pre-installed.
You may have to follow these instructions on setting up bash on OS X: Upgrading Bash on macOS
from dev-shell-essentials.
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from dev-shell-essentials.