I use MacTeX, and the current distribution comes with siunitx v2 (\ProvidesExplPackage {siunitx} {2020/02/25} {2.8b}). I would like to use units such as \ms and \hertz which require the abbreviations package. I load it with \sisetup{load=abbr}, but it seems to be v1 code and I get this warning:
Package siunitx Warning: Version 1 option 'load' detected
I tried the following code: \sisetup{load-configurations = abbreviations}, but my code does not work anymore, the \ms and \hertz are undefined.
Now I can only find the documentation for v3. Is there anything else I can try?