CommandLineTools.new crashes on macOS 26 beta 3

[GuMiner]

Issue

platform_specific uses all_available, without checking if all_available is not nil.

That results in:

Type error: command_line_tools[install them] ... had an error ... no implicit conversion of nil into String

Other notes

This is on a macOS 26 beta 3 VM. I suspect that this is because the found Command Line Tool options don't match with the regex. Notably, the found tools are:

* Label: Command Line Tools beta   for Xcode-26
(yes, two spaces in-between 'beta' and 'for')
...
* Label: Command Line Tools for Xcode 26.0 beta 3-26.0

But, the regex is:

/*.{1,8}Command Line Tools/

[GuMiner]

I'm looking at this, but wanted something tracking it if someone else hits this.

[reneleonhardt]

I guess first macOS 15 Sequoia would have to be supported under Officially Supported OS Versions before the work on Tahoe could get started...
https://github.com/microsoft/macos-cookbook#officially-supported-os-versions