![]() Once Apple stops providing security updates for a version of macOS, it accumulates a list of known vulnerabilities and is ripe for exploitation by malware. If it is necessary to be able to use essential hardware or software, then again that Mac must be treated as very special. Running old and unsupported versions of macOS which lack protections like SIP is also not something to do without a great deal of care. Above all else, this prevents inadvertent modifications being made to your system, regardless of how well protected you might feel that Mac is from malware. ![]() If the only way that you can use a particular video card or other hardware/software is by turning SIP off, then you shouldn’t think of risking that Mac in general use.īy far the best strategy for macOS security involves, at its centre, keeping SIP enabled fully and at all times. Exposing a Mac with SIP disabled to the slings and arrows of the Internet isn’t something that you should ever choose to do. If for any overriding reason you need to run a Mac with SIP turned off, or not fully on (there are degrees which are controlled in Recovery Mode), then that Mac must be treated as very special. System Integrity Protection is intended to do exactly what its name declares: protect the integrity of macOS. In case you know anyone who’s still affected by this, a complete set of solutions is available here.Īs is so often the case, there are lessons for all of us from this unusual problem. Without the /var symbolic link, the affected Mac is unable to boot normally. As the Keystone updater also cast aside the last protection on that symbolic link by running as root, it was able to delete that vital link. However, many of the affected Macs were running with SIP disabled, apparently to enable support for third-party video cards. As that’s normally protected by SIP, if your Mac was running with SIP enabled, it couldn’t do that, and no harm was done. Google’s rogue Keystone update erroneously attempted to remove the /var symbolic link on the startup volume. have Google’s Keystone updater software, used to autoupdate Google Chrome, try to apply a new update, which has since been pulled.have SIP disabled (or be running OS X 10.10.x or earlier, which don’t have SIP), and.Macintosh, Avid, Google and others revealed that what had happened was an unusual combination of circumstances.įor your Mac to be vulnerable to this severely debilitating problem, it had to: Almost a week ago, Variety, a publication not generally known for its coverage of Mac technical issues, reported that a “mysterious data corruption issue” had struck the Mac Pro (Late 2013) computers used in many Los Angeles film and TV editing studios.
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