I'm making a little more progress now. Did you do something?
nmalbmac0478748:~$ jiveapps create tmtest
=== Creating new Jive App "tmtest"...
Step 1 of 4. Checking availability and creating remote repository... FAILURE
Error on "name":
- has already been taken
nmalbmac0478748:~ $ jiveapps create tmtest2
=== Creating new Jive App "tmtest2"...
Step 1 of 4. Checking availability and creating remote repository... SUCCESS
Step 2 of 4. Generating app scaffolding...
Enter App Title or hit enter for default [tmtest2]:
Enter App Description or hit enter for default [Description of tmtest2]: Just another test
Step 3 of 4. Creating local Git repository and pushing to remote... The authenticity of host 'apphosting.jivesoftware.com (188.8.131.52)' can't be established.
RSA key fingerprint is 38:a3:60:d1:7d:f2:b5:22:33:f0:84:91:fd:2f:9d:3a.
Are you sure you want to continue connecting (yes/no)? yes
Step 4 of 4. Registering app on the Jive Apps Dev Center and installing on sandbox... FAILURE
- failed to install on sandbox
I also meet this problem, have you solved it?