This procedure is based on M1 Mac.

1. Download the source code and extract:

   BASH

   wget http://www.clustal.org/omega/clustal-omega-1.2.4.tar.gz && tar -xzvf clustal-omega-1.2.4.tar.gz && cd clustal-omega-1.2.4
   

2. Install argtable with Homebrew:

   BASH

   # You need install the Homebrew first if you haven't installed it.
   /bin/bash -c "$(curl -fsSL https://raw.githubusercontent.com/Homebrew/install/HEAD/install.sh)"
   
   brew install argtable
   

3. Compile and install:

   BASH

   ./configure CFLAGS='-I/opt/homebrew/Cellar/argtable/2.13/include' LDFLAGS='-L/opt/homebrew/Cellar/argtable/2.13/lib'
   make
   make install 
   

4. Check the installation:

   BASH

   which clustalo
   

5. Then you can use it with:

   BASH

   cd /path/to/your/sequence
   clustalo -i sequence.fasta -o output.fasta --seqtype=protein