// Offset from macOS 10.15.1
var offsetHandlerDeliveryReceipt = 0xA21F; # this is offset value
var deliveryReceiptHandlerAddr = iMessageBase.add(offsetHandlerDeliveryReceipt);
send("Hooking -[MessageServiceSession handler:messageIDDelivered:...] @ " + deliveryReceiptHandlerAddr);
Interceptor.attach(deliveryReceiptHandlerAddr, {
onEnter: function(args) {
send("DELIVERY_RECEIPT");
}

how to find macos offset value macos 10.15.1 = 0xA21F how to find other macos systems. some one tell me