AMC Mac installation failure using brew (Support #716)

Hello,

Can anyone please help with the error message I get when trying to install AMC on a Mac Sierra 10.12.6 using brew (brew install maelvls/amc/auto-multiple-choice)? You find the log below.

To sum up:
1) It cannot find make and clang utilities while which command shows they are respectively in /usr/bin/make and /usr/bin/clang .
2) Except that xcodebuild is installed, I cannot comment on this error: xcodebuild: error: SDK "/Library/Developer/CommandLineTools/SDKs/MacOSX10.13.sdk" cannot be located.

Thanks in advance for your time

MacBookMarcello:gwg marcellosartarelli$ brew install maelvls/amc/auto-multiple-choice
Updating Homebrew...
> Auto-updated Homebrew!
Updated 3 taps (homebrew/cask, homebrew/cask-versions and homebrew/core).

Warning: You are using macOS 10.12.
We (and Apple) do not provide support for this old version.
You will encounter build failures with some formulae.
Please create pull requests instead of asking for help on Homebrew's GitHub,
Discourse, Twitter or IRC. You are responsible for resolving any issues you
experience while you are running this old version.

> Installing auto-multiple-choice from maelvls/amc
> Installing dependencies for maelvls/amc/auto-multiple-choice: xz, netpbm, cmake, openjdk, ant, libbluray, libsoxr, libvidstab, libogg, libvorbis, libvpx, opencore-amr, opus, rtmpdump, flac, libsndfile, libsamplerate, rubberband, sdl2, snappy, speex, autoconf-archive, automake, giflib, leptonica, tesseract, theora, x264, x265, xvid, ffmpeg, cython, numpy, ilmbase, openexr, protobuf, swig, tbb, opencv, amc-pango, perl, nspr, nss, qt, poppler and qpdf
> Installing maelvls/amc/auto-multiple-choice dependency: xz
> Downloading https://downloads.sourceforge.net/project/lzmautils/xz-5.2.5.tar.gz
> Downloading from https://netix.dl.sourceforge.net/project/lzmautils/xz-5.2.5.tar.gz ######################################################################## 100.0%
==> ./configure --prefix=/usr/local/Cellar/xz/5.2.5
> make check
> make install
🍺 /usr/local/Cellar/xz/5.2.5: 92 files, 1.1MB, built in 2 minutes 13 seconds
> Installing maelvls/amc/auto-multiple-choice dependency: netpbm
> Cloning https://svn.code.sf.net/p/netpbm/code/stable
Updating /Users/marcellosartarelli/Library/Caches/Homebrew/netpbm--svn
> Checking out 3750
> make
Last 15 lines from /Users/marcellosartarelli/Library/Logs/Homebrew/netpbm/01.make:
2020-03-28 00:53:02 +0100

make

make: error: unable to find utility "make", not a developer tool or in PATH
xcodebuild: error: SDK "/Library/Developer/CommandLineTools/SDKs/MacOSX10.13.sdk" cannot be located.
clang: error: unable to find utility "clang", not a developer tool or in PATH

Do not report this issue to Homebrew/brew or Homebrew/core!

Error: You are using macOS 10.12.
We (and Apple) do not provide support for this old version.
You will encounter build failures with some formulae.
Please create pull requests instead of asking for help on Homebrew's GitHub,
Discourse, Twitter or IRC. You are responsible for resolving any issues you
experience while you are running this old version.