At the top of a single source file, I have the lines: % !TEX root = prd_Aestimatio-0301.tex % the root file % !TEX TS-program = ConTeXt2021 % !TEX useAlternatePath % !TEX useConTeXtSyncParser \setupsynctex[state=start, method=max] Syncing works well enough—though I can see no difference between method =min and method=max, both highlight only a few words and not the entire text to be synced, but perhaps my expectations are out of line. When I have these lines at the top of a component file and typeset the product file, I get a rootfile.synctex file, but syncing itself goes awry. Nothing happens when I sync from the PDf file to the component file, and when I sync from the component file to the product PDF, I get the correct page but no highlighting. I am using TeXShop ver. 5.03— sync method: Both Pdf Sync and Search Alternative Path: /Users/bowen1/Applications/LuaMetaTeX/tex/texmf-osx-arm64/bin and also the latest ConteXt (ver. 2022.10.15 10:37 LMTX) under macOS 12.6 (Apple M1 Pro chip) Note: the product file has only one component file for now. I suspect that I am missing something but am not sure where to look or what to do now. Any guidance will be much appreciated. Alan