Blackberry Jam fruit growth in southern California

[MarktLee]

Has anyone in the group fruited these Blackberry Jam fruit in California?
I was wondering if these will turn into yellow skinned fruit, or do I have another Randia species?. They have been staying this color for a few months and thought it was the cold here in Southern California keeping them from maturing.

[Pouteria_fan]

I have two small plants of this -- one died this winter, the other has nearly died but appears to be making a comeback. These were purchased from a Florida seller. I'm in zone 9b, Inland Empire CA area.

[achetadomestica]

I am in Florida but my fruit was green for a long time before it turned yellow
probably at least five or six months, it turned green in the Fall