Open geth (and other) binaries on MacOS

Recently, I had a problem opening the geth binaries (one of the Ethereum execution clients) on macOS.

 

After a short internet search, I found it was caused by extended attributes check. The problem like that occurs when the unsigned software is downloaded from the internet, but only using a web browser. When the curl or wget commands are used, there are no extended attributes assigned to the file.

 To check if the file has extra attributes, you can run a simple `ls -l` command and look for the `@` character.

> ls -l
-rwxr-xr-x@ 1 wawrzek  staff  45986920 17 Apr 07:06 geth

The list of attributes can be obtained with the `xattr` command:

> xattr geth
com.apple.quarantine

The same command can be used to remove the attribute

> xattr -d com.apple.quarantine geth

what enables an application to run.