For those who are interested, the latest TeXShop release provides support for ConTeXt's own syncing method (by invoking mtxrun --script synctex). This supersedes the old syncing method based on Laurens' SyncTeX, which should not be used any more. I have brought TeXShop's page in the wiki up to date (I haven't touched what are currently §1.4 and §1.5), with instructions to get synchronisation to work: https://wiki.contextgarden.net/TeXShop Make sure to read it carefully! I have tested the feature for some time now, and I'd say that it works pretty well (with some caveats, which I have annotated in the wiki). I take the opportunity to thank Hans for being so responsive with the changes in mtxrun necessary to provide this feature, and for patiently bear with my sometimes unclear requests or feedback. Kudos also to Richard Koch (TeXShop's author) for his relentless support of the macOS TeX community and, in this case, of the ConTeXt community! Happy ConTeXt'ing! Nicola