I'm trying to build a distributable version of my MacOS app using productbuild. The process used to work for me, but I transferred my files to a different computer, and now I can't complete the process.
I give the command
productbuild --component MyApp.app /Applications --sign "Developer ID Installer" InstallMyApp.pkg
and I get the error
Cannot write product to "InstallMyApp.pkg". (Could not find appropriate signing identity for “Developer ID Installer”.)
My keychain app clearly shows a certificate labeled Developer ID Installer: Gerald Agin (7HT9GPV6X3) with an expiration date 15 months in the future.
What am I missing?