Last to support classic Mac OS apps, and first to support Intel processors.įirst version to fully support 64-bit apps ( CS4 and later). Newer PDF files will either display incorrectly or cause a performance hit as Mac OS X will internally downconvert the document for display. ![]() However, as Mac OS X's use of PDF prioritizes speed and compatibility over features and compression, it is limited to PDF 1.3 (or PDF 1.4 for document " bundles" which contain embedded graphics). This replaced NeXTSTEP's Display PostScript implementation to avoid royalty fees to Adobe Systems. Mac OS X used a PDF-based imaging model called Quartz.
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