how to create new partition in the red-arrow pointing unallocated disk
And I don't want to lose any data in existing COMMON partition.
I haven't made any copy of common partition.
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In Mac OS, just resize it and then you will be able to create a new partition out of the free space.
If you want to move it to the back of the disk, then use
gparted by loading from, let's say SystemRescueCd.