To whom may have the same issue on Mac with new Sierra. Solution would be to add private key to SSH agent via:
ssh-add -K ~/.ssh/id_rsa
It looks like that identity[id_rsa] doesn’t persist by SSH agent.
Note this is not a permanent solution .. You would need to do that each time you clone a new repository.At least then no need to provide private key for each push to remote.
——– Update 28.Sep.2017 ——–
Permanent solution ( On Sierra):
Steps:
1- Be sure that you have a running ssh-agent in background before doing anything.
To check if ssh-agent is running by:
pgrep 'ssh-agent'
That command returns PID (ProcessID) of that process if it’s running.
If you see a value.. Go to Step#2. if not, so you need to run that agent in background by:
eval "$(ssh-agent -s)"
2- Edit ~/.ssh/config (Create if it doesn’t exist as su ):
Host *
AddKeysToAgent yes
UseKeychain yes
IdentityFile ~/.ssh/id_rsa
3- Then add that key agent ( that would be once ):
ssh-add -K ~/.ssh/id_rsa
That’s it.
Actually Step#2 is the crucial one. I just want to provide a complete guide.
I hope that may help you.’.