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A badly implemented third party app should result in giving root privileges unknown an unknown identity. Unless the OS it self ....

The iOS and iPad OS itself seams to have lots of holes too ... hummm.
 
Is there a benefit to using Adobe Acrobat Reader on a Mac? Preview seems to handle larger resolution PDFs with ease while it stutters and chokes with Adobe.
yes there is. some pdfs only work in adobe. for example bound documents
 
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