How can I run a command or script in rosetta from terminal on M1 Mac?

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How can I run a program or shell script in Rosetta from Terminal? I don't want to run the whole terminal in Rosetta. Just the parts I need.

1 Answers

The arch command is useful for that purpose

arch -arch_name binary args ...

See man arch for more details

Example without rosetta:

echo "arch" > build.sh
arch -arm64 /bin/bash ./build.sh 

Output:

arm64

(could run this with /bin/bash ./build.sh directly)

Example with rosetta:

echo "arch" > build.sh
arch -x86_64 /bin/bash ./build.sh

Output:

i386
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