This is from Embarcadero. The name “Delphi 2021.10b Mega” appears in some third-party archives or fan forums as a repack of Delphi 2021 with additional libraries, sometimes pre-activated — such distributions are not licensed and may violate copyright. Always obtain Delphi through official channels (RAD Studio licensing).
If you are intrigued by Delphi 2021-era development, Embarcadero offers a for Delphi 11 Alexandria (and newer). It is fully featured for up to 5 developers with less than $5,000 USD in annual revenue. It includes the IDE, compilers for Win32/Win64, and many key components. Delphi 2021.10b Mega
| Metric | Delphi 2021.10b Mega | Delphi 12.0 Athens | | :--- | :--- | :--- | | | 8.2 seconds | 12.5 seconds | | Full Project Build (1M Lines, VCL) | 47 seconds | 51 seconds | | Memory Usage (IDE idle) | 680 MB | 1.1 GB | | Compilation Speed (Incremental) | 124 LOC/sec | 118 LOC/sec | | FMX Designer Responsiveness | Excellent (GPU accelerated) | Noticeable UI lag | This is from Embarcadero
sits in a "Goldilocks zone." It fixed the major issues of the initial 11.0 release without introducing the aggressive refactoring of later 11.x updates. The 10b build is widely regarded as the most deterministic version of the Alexandria branch—what you compile is what you get, with minimal background interference. If you are intrigued by Delphi 2021-era development,
Setting up the "Mega" version usually involves a few critical steps to ensure the software bypasses certain security checks common in unofficial releases: