The developers of FreeBSD, open-source operating system, have made available the third BETA of version 12.1 (RC1 should be releasing shortly). Notable changes a fix to imx6-based arm board, 64-bit long double types, overflow logic error in fsck_msdoosfs(8), destruction of robust mutexes, regression system crash in vmxnet3, and several others. See the link below for a full list of changes.

A summary of changes since 12.1-BETA2 includes:

o An issue with imx6-based arm boards had been fixed.

o An issue with 64-bit long double types leading to link failures had
  been fixed.

o An overflow logic error had been fixed in fsck_msdosfs(8).

o An issue in destruction of robust mutexes had been fixed.

o Support for the '-vnP' flags to the zfs send subcommand had been
  added for bookmarks.

o The ixgbe(4) driver had been updated to prevent a potential system
  crash with certain 10Gb Intel NICs.

o A regression with the zfs send subcommand when using the '-n', '-P',
  and '-i' flags had been fixed.

o The freebsd-update(8) utility had been updated to include two new
  subcommands, updatesready and showconfig.

o Support for 'ps -H' had been added to kvm(3).

o An issue when compiling certain ports targeting Intel Atom CPUs had
  been fixed.

o A use-after-free in SCTP had been fixed.

o A regression that could lead to a system crash when using vmxnet3 had
  been fixed.

A list of changes since 12.0-RELEASE is available in the releng/12.1
release notes:

Please note, the release notes page is not yet complete, and will be
updated on an ongoing basis as the 12.1-RELEASE cycle progresses.

FreeBSD 12.1-BETA3 announcement:

Download the latest ISO/images: