[R-SIG-Mac] Please test R 4.2.0 pre-releases

[Simon Urbanek]

Dear Mac users,

we are nearing the release of R 4.2.0 (on Friday) which introduces some significant changes not only in R itself, but also in some Mac-specific build settings. Please help us by testing R pre-releases *before* the release such that any obvious issues can be caught prior to the release. The nightly pre-releases both for Intel Macs (high-sierra build) as well as M1 Macs (big-sur build) are available at

https://mac.r-project.org/

The nightly Installer packages (R-4.2-branch.pkg) are created just like the release and signed, but not always Apple notarized, so to install hold the <Ctrl> key when opening and pick "Open" in the dialog box if prompted.

Package binaries for R 4.2.0 are also now available on CRAN, please report any issues to me. The Mac Builder has also been updated to use latest libraries and it now defaults to the R pre-release.

Thanks,
Simon