Can you give more details? IIRC I have PP2 loaded in several 6.
I did the following: 1) Download and start Pharo 6.1 stable via the launcher. 2a) Attempt to install PetitParser2 via the CatalogBrowser: "Information There was an error while trying to install PetitParser2. Installation was cancelled." 2b) Attempt to install PP2 via the scripts from GitHub: Metacello new baseline: 'PetitParser2'; repository: 'github://kursjan/petitparser2'; load. Metacello new baseline: 'PetitParser2Gui'; repository: 'github://kursjan/petitparser2'; load. "Could not resolve: [BaselineOfPetitParser2] in [...]" Interestingly, it works in Pharo 7 dev, but there the GUI-Tools won't load because of some issues with their dependencies. I hope this helps. As I am not familiar with Pharo, I'd appreciate any hints. Best, Steffen