I am preparing to upgrade to Filemaker 15. But I have several Old mac's that can't be upgraded even to Filemaker 14 (running fm 13).
So, my questions is self explanatory. @
Yes they can, with the usual caveats that v14 clients won't "see" v15 features (e.g. concealed password fields)
FM Pro v13 can, we had to test yesterday for an upcoming staged upgrade.
Features such as using new buttons do not work, so all development needs to remain at v13 level until you move all clients to v15
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