Hey Fiona, Thanks for visiting our forum! However, the forum is here for technical support of Paul C. Buff products, and as outlined in the rules, topics not regarding our products is prohibited. And while you may be using the Sekonic to meter Paul C. Buff lights, the problems you are experiencing are not directly related to use with the lights, rather it is a Sekonic/Mac issue.
While we wish to provide assistance in any way possible, products from other manufacturers are outside of our area of expertise, and outside the scope of the forum. You may be able to find more focused assistance by visiting the Sekonic website and following thier links to support, facebook or Flickr sites.
Thanks for your understanding.
TS
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