Whilst looking in to ssh-ident, I realised that by default it will look for an identity with the same name as the current user.
$ ssh Warning: no keys found for identity michael in: ['/Users/michael/.ssh/identities/michael', '/Users/michael/.ssh']
Whilst this works, I sometimes use different names on different machines and wanted to use one identity across all machines.
To set the default, edit
~/.ssh-ident and add a
MATCH_PATH block. This empty regex will match every check and enable
personal as the default identity.
MATCH_PATH = [ (r"", "personal"), ]
If you want to specify multiple identities for different projects, you can. Just add them to
MATCH_PATH before your default.
MATCH_PATH = [ (r"work-project-one", "work"), (r"work-project-two", "work"), (r"", "personal"), ]