u/UnraidOfficial

The 7.3 release candidate is here!

The highlights:

Internal boot. USB flash drive is no longer required to run Unraid + a new onboarding wizard handles first-time setup; existing users can migrate via Tools → Onboarding Wizard. "Flash" is now "Boot" across the UI, where appropriate.
TPM-based licensing. License can now anchor to the motherboard, not a USB drive. Most boards from 2019+ have TPM 2.0 via firmware. New users get auto-detection; existing users can choose.
Docker 27 → 29.3.1. Heads-up: v29 randomizes container MAC addresses on upgrade. If you rely on stable MACs for DHCP reservations, firewall/router rules, or switch ACLs, this will bite. 7.3 adds a fixed MAC address field directly to Docker templates so you can lock them in. The jump also pulls in runc patches for CVE-2025-31133, CVE-2025-52565, and CVE-2025-52881.
Plus: ZFS corrupted-file visibility, zfs_arc_max as a proper WebGUI tunable, AMD XDNA/NPU + Intel firmware, Cooler Master Qube 500 case support, kernel 6.18.23, QEMU 10.2.2, libvirt 12.2.0, and a long list of File Manager / WebGUI fixes!

Full release notes, known issues, and rollback guidance: https://unraid.net/blog/unraid-7-3-rc.1