# Question regarding GNAT availability for MacOS arm64 via getada (or not) with the new ALIRE release

**URL:** https://forum.ada-lang.io/t/question-regarding-gnat-availability-for-macos-arm64-via-getada-or-not-with-the-new-alire-release/4464
**Category:** Help
**Created:** [May 30, 2026, 2:24am UTC](https://forum.ada-lang.io/t/question-regarding-gnat-availability-for-macos-arm64-via-getada-or-not-with-the-new-alire-release/4464 "2026-05-30T02:24:53Z")
**Posts on this page:** 2
**Page:** 1

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### Author: ![Ret\_Build\_Engineer](https://forum.ada-lang.io/letter_avatar_proxy/v4/letter/r/ccd318/32.png) [@Ret\_Build\_Engineer](https://forum.ada-lang.io/u/Ret_Build_Engineer)
#### Post date: [May 30, 2026, 2:24am UTC](https://forum.ada-lang.io/t/question-regarding-gnat-availability-for-macos-arm64-via-getada-or-not-with-the-new-alire-release/4464/1 "2026-05-30T02:24:53Z")

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I just updated to the MacOS arm64 version of Alire 2-3.

First of all: Thank you for providing a MacOS arm64 version!

Now my question. I tried to use a pre-existing failing attempt to solve a Rosetta Code task (Hamming numbers) using the new release of Alire.

````ada
Changes to dependency solution:

   + gnatcoll_gmp 26.0.0 (new)
   +📦 libgmp 6.3.0 (new,indirect,system package)

   🛈 The solution requires a toolchain that is
      not yet installed. Accepting the solution
      will download and install this toolchain.

Do you want to proceed?
[Y] Yes [N] No (default is Yes) n
```

Would this have downloaded an x86-64 version of GNAT Ada compiler? or would it fail? or would it actually find an arm64 MacOS GNAT Ada?

I'm on MacOS 26.5 (Tahoe) arm64.

Thanks,
RBE

````

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### Author: ![Irvise](https://forum.ada-lang.io/letter_avatar_proxy/v4/letter/i/7ba0ec/32.png) [@Irvise](https://forum.ada-lang.io/u/Irvise)
#### Post date: [May 30, 2026, 10:53am UTC](https://forum.ada-lang.io/t/question-regarding-gnat-availability-for-macos-arm64-via-getada-or-not-with-the-new-alire-release/4464/2 "2026-05-30T10:53:34Z")

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Hi RBE,

I may be wrong here, but I believe the warning is about `libgmp`, which is a external package. Alire can detect external GNAT installations and if not, it should ask you to install one (via Alire) or configure one manually. So short answer, I think Alire should be able to detect your toolchain and would not install a new one.

Best regards,  
Fer