Hi David, > I’m seeking a transition OSX that will run both 13.5/6 and v15.2.
Look at the Certification Matrix for both v13.6 and v15.3... v15.3: http://download.4d.com/Documents/Products_Documentation/LastVersions/Line_15/VIntl/20161104_CertifV15_3_INTL.pdf v13.6: http://download.4d.com/Documents/Products_Documentation/LastVersions/Line_13/VIntl/PDF_Format/4Dv13.6_Certif-Matrix.pdf ... there is no overlap where they both have a "certified" status on the same OS. If you use 10.9 then you are certified for 13.6 but only Compatible with 15.3 If you use 10.10 then you are Certified with 15.3 but only Compatible with 13.6 If you use 10.11 then you are certified with 15.3 but in the "Not Tested" category with 13.6 On the other hand, v14 is certified for both 10.9.5 and 10.10.5 while listing 10.11 as only Compatible: http://download.4d.com/Documents/Products_Documentation/LastVersions/Line_14/VIntl/CertifV14_5_US.pdf So there is "certified" overlap for v13/v14 in 10.9.5 and there is "certified" overlap for v14/v15 in 10.10 I hope this helps! Kind Regards, Tim PENNER ********************************************************************** 4D Internet Users Group (4D iNUG) FAQ: http://lists.4d.com/faqnug.html Archive: http://lists.4d.com/archives.html Options: http://lists.4d.com/mailman/options/4d_tech Unsub: mailto:4d_tech-unsubscr...@lists.4d.com **********************************************************************