linuxPackages: 6.6 -> 6.12 (#370410)

K900 bcdfbb7b ac791cd5

Changed files
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nixos
doc
manual
release-notes
pkgs
top-level
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nixos/doc/manual/release-notes/rl-2505.section.md
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Users on old macOS versions should consider upgrading to a supported version (potentially using [OpenCore Legacy Patcher](https://dortania.github.io/OpenCore-Legacy-Patcher/) for old hardware) or installing NixOS.
If neither of those options are viable and you require new versions of software, [MacPorts](https://www.macports.org/) supports versions back to Mac OS X Snow Leopard 10.6.
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- The default kernel package has been updated from 6.6 to 6.12. All supported kernels remain available.
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- GCC has been updated from GCC 13 to GCC 14.
This introduces some backwards‐incompatible changes; see the [upstream porting guide](https://gcc.gnu.org/gcc-14/porting_to.html) for details.
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pkgs/top-level/linux-kernels.nix
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});
packageAliases = {
-
linux_default = packages.linux_6_6;
+
linux_default = packages.linux_6_12;
# Update this when adding the newest kernel major version!
linux_latest = packages.linux_6_12;
linux_rt_default = packages.linux_rt_5_15;