[DanielHB]

sed has different syntax on macos because macos is based on BSD.

Really annoying to get a ticket "fix this build script for macos" and it is freaking sed compatibility issues.

edit: to be fair that happened once, but it was annoying

[rbanffy]

MacPorts provides GNU equivalents to the native BSD ones. You can always check if there is a `gsed` binary and use it (or check the OS, but checking direct behavior is always best).

But yes, macOS is a Unix, not a Linux.

[frollogaston]

Then you run into Mac scripts expecting the BSD ones when you installed GNU. Similar issue with changing shell to bash.