If you're running IBM Notes 9.0.1 and have updated to macOS 10.14 Mojave, be aware that you'll also need to install the most recent hot fix for Notes: -
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SPR #IFBTB4QLEJ is in MAC 64-bit 901IF16 and higher. This fixes a Notes Client crash on the new Mojave OS.
aka: -
Notes 64-bit 9.0.1 IF16Mac 64-bitNotes_901IF16_MAC64_StandardIBM_Notes_Hotfix_901SHF993.dmg
This iFix is available from IBM Fix Central here: -
Having applied this today, this is what I now have: -
and, more importantly, Notes and Mojave are playing nicely ……