need help with macadamia tree
Healthy 40 yr old mac tree in SoCal started mass drop of nuts 7-10-18 and continues today. Over 1000 nuts on ground in 48 hrs. Nuts are 50 to 75% mature. Conditions are typical, this is a first.
It is most likely that the tree is reaching an age that will not allow it to produce healthy fruit. They will often drop what they cannot support. It may be that you need to fertilize the tree, as the soil can run out of nutrients over time, especially if it is not fertilized annually.
This article will help you with the care of these trees: https://www.gardeningknowhow.com/edible/fruits/figs/fig-tree-is-producing-fruit.htm