FYI: You'll want to do this (procedure listed in previous comments) every time you install a new (or edited) curve. It is a permissions issue, doesn't always effect El Capitan but I'm seeing it every time w/ El Capitan right now. I'm currently in testing of QTR and 10.10 at InkjetMall (Piezoland) happy printing all, Walker
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Re: [QuadtoneRIP] Problem Installing A Profile Using QTR 2.7.7 & El Capitan (SIP Issue)
2016-01-27 by Walker Blackwell