Linux runs fine on Intel Macs. There are a couple peculiarities you’ll want to be aware of, though.

• Ventoy doesn’t work as an installer. The boot menu will come up, but any ISO you choose will hang
• Not all distros will recognize the wireless card and install the firmware (Be prepared to install it using a USB to Ethernet adapter)
• Same goes for the iSight web cam

Other than those initial hiccups, everything works pretty flawlessly.

To amplify RedWeasel’s very good answer, fstab runs as root and unless you specify otherwise, the share will mount with root as the owner on the local machine. From the perspective of the Samba server, it’s the Jellyfin user accessing the files, but on the local machine, but local permissions come into play as well. That’s why you can get at the files when you connect to the share from Dolphin in your KDE system—it’s your own user that’s mounting the share locally.