Hi Vabsie,
I wasn’t aware that MT4 was available natively on a Mac, either. The obvious solution would be to use a virtualised environment but I’m assuming that you’re concerned that this would impact optimisation performance.
The solution could be to export a CSV in the 4hr format with a custom format like:
{Timestamp:yyyy.MM.dd,HH:mm},{Open:f5},{High:f5},{Low:f5},{Close:f5},{Volume:F0}
Alternatively, you could generate the HST files and then copy them over.
Hope this helps.