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Apple is on round four of its macOS Ventura 13.1 beta, providing developers with a fresh build for testing.
The latest builds can be downloaded by developers taking part in the beta-testing program via the Apple Developer Center, or as an over-the-air update for any hardware that's already running the beta builds. Public beta versions of the releases generally arrive a short while after their developer counterparts, available through the Apple Beta Software Program website.
The fourth macOS Ventura 13.1 beta build is number 22C5059b, replacing the third, build 22C5050e. Apple also released a beta for macOS Monterey 12.6.2 for developer testing.
AppleInsider, and Apple itself, strongly insist users don't install betas onto "mission-critical" or primary devices, due to the minor chance of data loss or other issues. Instead, testers should install betas onto secondary or non-essential devices, and to ensure there are sufficient backups of important data before updating.