Create secure-input.md

Author: badboy

src/macOS/secure-input.md

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+# Check who holds SecureInput lock
+
+Individual applications on macOS can request `SecureInput` mode, which disables some functionality that would otherwise allow to capture input.
+One can check if `SecureInput` is active and which process holds the lock:
+
+```
+$ ioreg -l -w 0 | grep SecureInput
+  |   "IOConsoleUsers" = ({"kCGSSessionOnConsoleKey"=Yes,"kSCSecuritySessionID"=100024,"kCGSSessionSecureInputPID"=123,"kCGSSessionGroupIDKey"=20,
+      "kCGSSessionIDKey"=257,"kCGSessionLoginDoneKey"=Yes,"kCGSSessionSystemSafeBoot"=No,"kCGSSessionUserNameKey"="user",
+      "kCGSessionLongUserNameKey"="username","kCGSSessionAuditIDKey"=100001,"kCGSSessionLoginwindowSafeLogin"=No,"kCGSSessionUserIDKey"=101})
+```
+
+The `kCGSSessionSecureInputPID` holds the PID of the process that holds the `SecureInput` lock.
+Find that process with `ps`:
+
+```
+ps aux | grep $pid
+```