Sys­tem In­tegrity Pro­tec­tion

Mac Format - - MAKE MORE OF EL CAPITAN & iOS 9 -

This new se­cu­rity mea­sure is in­tended to pro­tect OS X – its sys­tem files and run­ning pro­cesses – from mod­i­fi­ca­tion, ei­ther by ma­li­cious soft­ware or accident. This has con­se­quences for cer­tain soft­ware.

On the more ob­vi­ous end of the scale, soft­ware such as WinClone (twoca­ can still make a backup im­age of a Mac’s Boot Camp par­ti­tion eas­ily enough, but when you try to re­store the im­age you might see a warn­ing that Sys­tem In­tegrity Pro­tec­tion must be dis­abled (see­cap­win).

Tools whose im­pact would seem less dra­matic are also af­fected. For ex­am­ple, it’s no longer per­mit­ted for pro­cesses to at­tach to sys­tem-level ones, so tools like To­talFin­der (bi­na­ can’t pig­gy­back on the Finder to en­hance it.

Sys­tem In­tegrity Pro­tec­tion can be dis­abled, though it’s not rec­om­mended on a per­ma­nent ba­sis. Start your Mac in its Re­cov­ery sys­tem by hold­ing ç+R at the startup chime. Choose Util­i­ties > Ter­mi­nal from the menu bar, then en­ter csru­til dis­able; re­boot. Per­form what­ever you needed in OS X proper, then re­turn to the Re­cov­ery sys­tem to re-en­able the fea­ture us­ing the com­mand csru­til en­able; re­boot. If you’re un­cer­tain that you turned Sys­tem In­tegrity Pro­tec­tion on again, open Ter­mi­nal in OS X proper and type csru­til sta­tus. Ap­ple’s tech­ni­cal doc­u­men­ta­tion for Sys­tem In­tegrity Pro­tec­tion is at­cap­sip.

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