Apple has released new betas for developers, highlighted with the fourth beta of iOS 12.1.3. Here’s what’s available today:
- macOS Mojave 10.14.3 beta 4 (18D39a)
- iOS 12.1.3 beta 4 (16D5039a)

This beta 4 release of iOS 12.1.3 comes only three days after the third beta, and the accelerated timeline suggests a final public release may be coming sooner, rather than later.
No word on what’s new aside from the usual bug fixes and performance improvements, but stay tuned.
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