A: No. Patch 1.31 was the last version to support 32-bit Macs, but Apple has since killed 32-bit support. You need Windows 7/10/11 or Linux via Wine.
To run 1.31 today, the most reliable "community-approved" methods involve downloading pre-installed archive files rather than using the original installers, which often fail or auto-update. Warcraft 3 Frozen Throne 1.31 Download
Patch 1.31 is the standard for (competitive ladder) and Eurobattle.net . Warcraft 3 Frozen Throne 1.31 Download