Eclipse import error

Hi All,

Kindly be informed that after downloading the core from buckminster and set up eclipse as per evenos consulting video from youtube but when importing the adempiere.mspec file, I faced to below issue, can someone assist please?

ERROR [0005] : No suitable provider for component org.apache.felix.webconsole.plugins.memoryusage:osgi.bundle was found in resourceMap file:/Users/mac/Documents/workspace/myexperiment/org.adempiere.sdk-feature/adempiere.rmap
ERROR [0005] : No suitable provider for component org.apache.felix.webconsole.plugins.memoryusage:osgi.bundle was found in searchPath bundles.maven
ERROR [0005] : Resolution attempt ended with exception: Provider maven2(http://central.maven.org/maven2): Missing CSpec source required by component type osgi.bundle
ERROR Provider maven2(http://central.maven.org/maven2): Missing CSpec source required by component type osgi.bundle
ERROR [0005] : No suitable provider for component org.eclipse.jdt.core.compiler.batch:osgi.bundle was found in resourceMap file:/Users/mac/Documents/workspace/myexperiment/org.adempiere.sdk-feature/adempiere.rmap
ERROR [0005] : No suitable provider for component org.eclipse.jdt.core.compiler.batch:osgi.bundle was found in searchPath bundles.maven
ERROR [0005] : Resolution attempt ended with exception: Provider maven2(http://central.maven.org/maven2): Missing CSpec source required by component type osgi.bundle
ERROR Provider maven2(http://central.maven.org/maven2): Missing CSpec source required by component type osgi.bundle

I am using eclipse Mars on OSX 10.10 .5 with JDK 8

Thank you in advance and best regards,