I have an app ready for the Mac App Store and have it packaged up ready to go. It's specified as compatible with Mac OS 10.7 upwards. I've tested installation on all the available systems here, 10.12.1, 10.11.6, 10.8.5 (2 machines) and 10.7.5. It's fine on all except the last. On 10.7.5 the installer immediately comes back with an Alert: xxx can't be installed on this computer. The installer log is no further help, after the preamble it comes to identifying the product, followed by 2 lines:
Installation checks failed
Installation check failure. . xxx can't be installed on this computer
If I simply put the codesigned and sandboxed app into the Applications folder, it starts up and runs fine.
How can I go further in investigating this?
thanks,
Richard