Season Ticket Holders have Season Pass through the Apple TV app included, after linking the service to a valid active Apple ID account. Season Ticket Holders should receive an email with redeem instructions from their club.
MLS Season Pass FAQ for Season Ticket Holders - MLS Support
Can I redeem my MLS Season Pass if I don’t have an Apple device?
Yes, your MLS Season Pass can be redeemed on non-Apple devices via web browser. You will need to have an active Apple ID in order to redeem.
Your Apple ID email for this service doesn’t have to be the same as the email known to MLS/your club.
I don’t know what the email from the club would say; you would know that better. It should mention redeeming through some website as an option, though.
Once linked to your Apple ID account, the MLS streaming service will be available in the Apple TV app, including on select smart TVs and third party streaming devices, as well as on the web.
How to watch Apple TV+, MLS Season Pass, and more - Apple Support
Get the Apple TV app or Apple TV+ app on your smart TV or streaming device - Apple Support
List of Apple TV app-supported smart TVs and third party streaming devices - Apple
Regular subscribe (and viewing?) options on Apple devices require current models with up-to-date system software (iOS 16.2 or later, iPadOS 16.2 or later, tvOS 16.2 or later, macOS Ventura 13.1 or later). [1] [2]
Slightly older operating system users should try the web option, to view on iPhone/iPad/Mac.
(this is odd considering i have a mac)
And what model would that be? What is its version macOS?
Identify the model of your Apple device - Apple Support
Find out which macOS your Mac is using - Apple Support