Hi, not sure this is the right mailing list, but anyway - I maintain the WGCNA package, and was just alerted by a Mac user that it is not available. Looking at the error log at http://www.r-project.org/nosvn/R.check/r-release-macosx-ix86/WGCNA-00check.html reveals checking package dependencies ... ERROR Package required but not available: 'impute' Packages suggested but not available for checking: 'org.Mm.eg.db' 'minet' The impute package is available from bioconductor, for all major OS-es including Mac OS (10.5 and higher, presumably). The fact that impute is only available from bioconductor is apparently not a problem for WGCNA check and compilation on other platforms - what is the problem with Mac OS? Do they not provide the correct version? Thanks, Peter