Racket for Mac

To restore packages installed for a previous version of Racket, use DrRacket's File > Package Manager > Copy from Version or at a command line use raco pkg migrate.

New Features and Updates

• The **racket-lang.org** website no longer distributes Racket BC bundles, but it includes pre-built bundles for two flavors of ARM linux, AArch64 and 32-bit ARMv6 VFP.
• XML structures are **serializable**.
• The **struct** form supports **#:properties prop-list-expr**, making it more convenient to attach multiple property values to a structure type.
• The **net/imap** library supports IMAP’s **move** operation.
• Unsafe code can use **“uninterruptible mode”** instead of “atomic mode” to allow futures to run concurrently while preventing interruptions from other threads.

Improvements and Changes

• Scribble’s **HTML generation conforms better to modern standards**.
• Racket uses **Unicode 16.0** for character and string operations.
• The **redex-check** default generation strategy always uses random generation to supplement the enumerator.
• DrRacket supports the use of **shift-tab to go backward** to previous indentation positions.
• The **macro stepper** supports the **string-constants library**, allowing internationalization of the stepper itself.
• Build-system improvements support containers registered at **Docker Hub** to build for all platforms that have downloads from the main Racket download site; improvements also support Unix-style builds for Mac OS in the style of MacPorts.
• The **expt** function produces a more accurate result when its first argument is a flonum and its second argument is an exact integer that has no equivalent flonum representation than it did in prior versions.
• TCP ports use **SO\_KEEPALIVE** correctly.
• There are many other repairs and documentation improvements!