Hi, I'm working with Yosemite 10.10.5 and am getting an error of invalid argument when i call host_processor_set_priv. Here is the background: snippet... pid_t targetPid; mach_port_t remoteTask=0; err = task_for_pid(mach_task_self(), targetPid, &remoteTask); When I tried calling this I got err=5 I tried adding my user to procmod and procview groups but that had no effect. I also tried adding flags to my Info.plist file: <key>SecTaskAccess</key> <array> <string>allowed</string> <string>safe</string> </array> This had no effect. I'm using the nvram boot-args="kext-dev-mode=1" setting so I don't have to sign. I also modified taskgated.plist so that it starts up with -p -s at boot time. I check it with the ps command and it is now running with -p -s . However all these changs have no effect on the issue. I'm just running as a normal user. I then started down an alternate approach. mach_port_t me=mach_host_self(); // this works mach_port_t psDef; mach_port_t psDefCtl; kern_return_t k; processor_set_default(me, &psDef); //Appears to work k = host_processor_set_priv(me, psDef, &psDefCtl); // Fails ==> k is set to 4 (invalid argument) If I run as su it runs fine. Why do I get this error when I want to run as a normal user? How do I get around it? What do I need to do to be able to call host_processor_set_priv or task_for_pid successfully without being a su? I own both tasks that one I am and the remote task, htey are just separate processes. Side note: Over in the authorizations.plist under system.privilege.taskport are a bunch of key/value pairs. Is there any documentation anywhere? In particular I found a k/v pair of class/allow do I need to add a 'safe' to this somehow? the manpage for taskgated mentions safe being necessary but I don't see a good way to add it there as I don't know by what mechanism to add it. If the solution is here, do I need to make the value portion an <array> of <string> values? GC _______________________________________________ Do not post admin requests to the list. They will be ignored. Darwin-kernel mailing list (Darwin-kernel@lists.apple.com) Help/Unsubscribe/Update your Subscription: https://lists.apple.com/mailman/options/darwin-kernel/site_archiver%40lists.... This email sent to site_archiver@lists.apple.com