"The installation cannot continue" when installing 4.0.3 onn RAD 9.0 with Mac OS

Extracted from https://jazz.net/forum/questions/127181/ibm-rad-90-and-rtc-40x-on-osx
When trying to install (4.0.3) via P2 I get the following error:
When trying to install (4.0.3) via P2 I get the following error:
The items selected for install include software (com.ibm.rcp.dombrowser.feature.feature.jar) that requires install procedures from the older Eclipse Update Manager. The installation cannot continue.
Any other ideas?