Please consider MultiMC software.
https://multimc.org/
All Twitch modpacks are available in zip file from Curse Forge website.
https://minecraft.curseforge.com/modpacks
You can download the pack zip file and install it easily in MultiMC. It handles the format quite well.
In addition, MultiMC is the easiest way to edit any modpack to suit your needs.
MultiMC is multiPlatform capable, Minecraft does the rest for multiPlayer.
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