Hello guys,
After upgrade for Alfresco SDK 3.0, all of my projects managed by Eclipse, present an error as below:

What requisite are necessary for new SDK ?
My environment:
MacOS : 10.12.25
Java: 1.8.0.51-b16
Apache-maven: 3.5.0
Alfresco Community 5.2f
Eclipse Java EE IDE Web Dev, NEON
Could anyone cam help me?
Many thanks