Something worth noting about using APEX on Oracle DB Developer VM:
- Installation scripts of APEX are missing..
- Version 5.0 installed, need to upgrade to 5.0.2
- No Admin password..
- Database Tablespace holding the OBE workspace is limited to 50MB..
- Oracle Database is configured to use 300MB of Memory..
So, although this combo of Virtualbox + Oracle DB Developer VM works fine it does need some fine tuning to help you make it better..