RAD Studio 12.2 Patch #1 provides quality improvements to the 12.2 release, focused on RAD Studio IDE, FireMonkey, the bcc64x Win64 Modern toolchain, RAD Server, and the 64-bit versions of the Delphi compiler.

The patch also fixes a package binary compatibility issue that prevents using packages built in RAD Studio 12.2 in RAD Studio 12.1 and 12.0, mostly affecting third-party component vendors. While only a few source files needed changes to address this binary compatibility issue, it affects almost all DCU file signatures and runtime packages for all of our target platforms. Delivering this as a hotfix would have resulted in a large download (~ 1GB) and many files to install. Using the product installer, which is intended for this purpose, offers a much better alternative than using our simple patch tool.