Support for Apple Silicon (M1) in Allegro CL

64-bit Allegro CL Express

As of 2021-02-19 11:00 PST, the downloads from our website were updated to include the fixes needed to run on M1 Macs. If you downloaded before this date, please download a new version of the Express from here.

SMP 64-bit Allegro CL Enterprise and Professional

The 64-bit SMP Allegro CL is not yet supported, as there are issues with the Intel 64-bit emulation layer on M1 Macs. As soon as it is supported we will update this page.

non-SMP 64-bit Allegro CL Enterprise and Professional

This patch adds support to existing Intel 64-bit versions of Allegro CL for all Apple Silicon (M1) processors. A native port to Apple Silicon is in the works and will be released in the future. Intel 64-bit support is achieved through emulation on the new hardware, and it will not perform as well as a native port.

There are two ways to install Allegro CL on Apple Silicon:

  1. Copy an updated /Applications/ from an Intel Mac to /Applications/ on an M1 Mac.
  2. Using, the original ACL distribution and your license file, install directly on an M1 Mac. See the instructions in the script for details.

Problems or questions?

If you have questions not answered by the above, please email us at

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