Created attachment 112375 [details] Differences of the modifications on I attached difference file that I modified in my local copy of 3.13.0 running on MacOS High Sierra 10.13.4 using Xcode 9.3.
Hi Alex, Thanks for the report. We already have preliminary support for macOS 10.13 High Sierra in the (unreleased) Valgrind git. See here for instructions: http://valgrind.org/downloads/repository.html We'd welcome any testing. There are a few known issues, so please review existing bug reports before creating a new one.