The installation instructions are at the foot of the page. Instant Client Downloads for macOS (Intel x86) See the Instant Client Home Page for more information about Instant Client. However, Oracle’s documentation for installing Instant Client is very light. Oracle’s Instant Client is a valuable tool allowing anyone on a Mac to connect to Oracle databases, and is a prerequisite for installing SQL Developer, SQLPlus, or OCI8 (for PHP connectivity). Oracle’s Instant Client is a valuable tool allowing anyone on a Mac to connect to Oracle databases, and is a prerequisite for installing SQL Developer. The Pro.C parser fails to recognize C99 headers on Apple Mac OS X El Captain, Apple Mac OS X Yosemite, and Apple Mac OS X.
