Hi Michael - I tried your suggestion of rebooting my system and trying again, to see if it gave me similar messages. As the folder had already been partially copied I selected merge when prompted.” Sadly and even with fingers crossed I was quickly served up the familiar “bs6457.m4a” is in use! error message, so I frustratingly I failed, ouch!!!!

Other than getting in touch with NASA I think the best solution is to wait as advised by BIAB support for the Mac 2024 update plus I’ll add the UltraPAK upgrade which would contain all the previous RealTracks as well as the new ones being released for 2024.

Thanks everyone for your help.

Keep grovin’.

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Mac platform. 3.3 GHz 6-Core Intel Core i5 - 128 GB Ram - OS 14.5
Samsung T9 4TB SSD, SanDIsk 2TB SSD
Cubase 13
SIbelius Ultimate
Band-in-a-Box® for Macintosh - Version Version 2024 (803) - 64 bit application