System use arm64-darwin ( Apple silicon ), but got *-x86_64-darwin.gem

[koten0224]

Use this following command to install Mongory:

gem install mongory -v 0.7.8 --platform arm64-darwin

When use MacOS, run
gem install mongory
and require mongory in ruby:
require 'mongory'
got error:

Mongory C extension is disabled because mongory_ext is not loaded: 
dlopen(/Library/Ruby/Gems/2.6.0/gems/mongory-0.7.8-x86_64-darwin/lib/core/2.6/mongory_ext.bundle, 0x0009): 
tried: '/Library/Ruby/Gems/2.6.0/gems/mongory-0.7.8-x86_64-darwin/lib/core/2.6/mongory_ext.bundle' 
(mach-o file, but is an incompatible architecture (have 'x86_64', need 'arm64e' or 'arm64')), 
'/System/Volumes/Preboot/Cryptexes/OS/Library/Ruby/Gems/2.6.0/gems/mongory-0.7.8-x86_64-darwin/lib/core/2.6/mongory_ext.bundle' (no such file), 
'/Library/Ruby/Gems/2.6.0/gems/mongory-0.7.8-x86_64-darwin/lib/core/2.6/mongory_ext.bundle' 
(mach-o file, but is an incompatible architecture (have 'x86_64', need 'arm64e' or 'arm64')) 
- /Library/Ruby/Gems/2.6.0/gems/mongory-0.7.8-x86_64-darwin/lib/core/2.6/mongory_ext.bundle

POV: have 'x86_64', need 'arm64e' or 'arm64'

The root cause is the platform of Ruby 2.6 is universal-darwin24

> ruby -e 'puts RUBY_PLATFORM; require "rbconfig"; puts RbConfig::CONFIG["arch"]; p Gem.platforms'
->
universal.arm64e-darwin24
universal-darwin24
["ruby", #<Gem::Platform:0x0000000136821478 @cpu="universal", @os="darwin", @version="24" @cpu="universal", @os="darwin", @version="24">]

This platform will be explained as x86_64-darwin by Rubygem

You need to install it with specific platform

gem install mongory -v 0.7.8 --platform arm64-darwin

Or install via Gemfile:

gem 'mongory'

and run the following command

bundle config set specific_platform true
bundle lock --add-platform arm64-darwin

You will see this in your Gemfile.lock

PLATFORMS
  ruby
  arm64-darwin

and run bundle install, it will be correct