I have created a seed phrase for Electrum on "Tails" (Linux) and then imported those word phrases into Electrum for Windows before, but I have not done this for a Mac. I presume that the word phrases are not unique to any specific operating system, so you can import it into any Electrum wallet, no matter what OS you are using.
Ps : Do not use "Tails" without a Persistent volume, because you will lose it. It comes with a default Electrum wallet installed, but it is mostly outdated.
Electrum seeds are forward compatible, and you would be able to import a seed that is generated by an older version of the Electrum (pre-V2) in the wallet today. You can use Tails without a persistent volume so long as you make the effort to backup and import the seeds everytime you're using it. It is better for privacy that way.Ps : Do not use "Tails" without a Persistent volume, because you will lose it. It comes with a default Electrum wallet installed, but it is mostly outdated.