diff --git a/netenv/environment_darwin.go b/netenv/environment_default.go
similarity index 96%
rename from netenv/environment_darwin.go
rename to netenv/environment_default.go
index b9f7c0da..f4312c2f 100644
--- a/netenv/environment_darwin.go
+++ b/netenv/environment_default.go
@@ -1,3 +1,5 @@
+//+build !windows,!linux
+
 package netenv
 
 import "net"
diff --git a/network/state/system_default.go b/network/state/system_default.go
new file mode 100644
index 00000000..64cff2fb
--- /dev/null
+++ b/network/state/system_default.go
@@ -0,0 +1,43 @@
+// +build !windows,!linux
+
+package state
+
+import (
+	"time"
+
+	"github.com/safing/portbase/config"
+	"github.com/safing/portmaster/network/socket"
+)
+
+func init() {
+	// This increases performance on unsupported system.
+	// It's not critical at all and does not break anything if it fails.
+	go func() {
+		// Wait for one minute before we set the default value, as we
+		// currently cannot easily integrate into the startup procedure.
+		time.Sleep(1 * time.Minute)
+
+		// We cannot use process.CfgOptionEnableProcessDetectionKey, because of an import loop.
+		config.SetDefaultConfigOption("core/enableProcessDetection", false)
+	}()
+}
+
+func getTCP4Table() (connections []*socket.ConnectionInfo, listeners []*socket.BindInfo, err error) {
+	return nil, nil, nil
+}
+
+func getTCP6Table() (connections []*socket.ConnectionInfo, listeners []*socket.BindInfo, err error) {
+	return nil, nil, nil
+}
+
+func getUDP4Table() (binds []*socket.BindInfo, err error) {
+	return nil, nil
+}
+
+func getUDP6Table() (binds []*socket.BindInfo, err error) {
+	return nil, nil
+}
+
+func checkPID(socketInfo socket.Info, connInbound bool) (pid int, inbound bool, err error) {
+	return socketInfo.GetPID(), connInbound, nil
+}
diff --git a/pack_core b/pack_core
index edd368f4..de86b2f8 100755
--- a/pack_core
+++ b/pack_core
@@ -70,11 +70,13 @@ function build {
 function check_all {
   GOOS=linux GOARCH=amd64 check
   GOOS=windows GOARCH=amd64 check
+  GOOS=darwin GOARCH=amd64 check
 }
 
 function build_all {
   GOOS=linux GOARCH=amd64 build
   GOOS=windows GOARCH=amd64 build
+  GOOS=darwin GOARCH=amd64 build
 }
 
 case $1 in
diff --git a/pmctl/pack b/pmctl/pack
index 6e050ec4..1e83e602 100755
--- a/pmctl/pack
+++ b/pmctl/pack
@@ -70,11 +70,13 @@ function build {
 function check_all {
   GOOS=linux GOARCH=amd64 check
   GOOS=windows GOARCH=amd64 check
+  GOOS=darwin GOARCH=amd64 check
 }
 
 function build_all {
   GOOS=linux GOARCH=amd64 build
   GOOS=windows GOARCH=amd64 build
+  GOOS=darwin GOARCH=amd64 build
 }
 
 case $1 in
diff --git a/process/process_default.go b/process/process_default.go
new file mode 100644
index 00000000..5266462b
--- /dev/null
+++ b/process/process_default.go
@@ -0,0 +1,13 @@
+//+build !windows,!linux
+
+package process
+
+// IsKernel returns whether the process is the Kernel.
+func (p *Process) IsKernel() bool {
+	return p.Pid == 0
+}
+
+// specialOSInit does special OS specific Process initialization.
+func (p *Process) specialOSInit() {
+
+}
diff --git a/process/process_linux.go b/process/process_linux.go
index 44a21098..90dcfecc 100644
--- a/process/process_linux.go
+++ b/process/process_linux.go
@@ -1,20 +1,5 @@
 package process
 
-// IsUser returns whether the process is run by a normal user.
-func (p *Process) IsUser() bool {
-	return p.UserID >= 1000
-}
-
-// IsAdmin returns whether the process is run by an admin user.
-func (p *Process) IsAdmin() bool {
-	return p.UserID >= 0
-}
-
-// IsSystem returns whether the process is run by the operating system.
-func (p *Process) IsSystem() bool {
-	return p.UserID == 0
-}
-
 // IsKernel returns whether the process is the Kernel.
 func (p *Process) IsKernel() bool {
 	return p.Pid == 0
diff --git a/process/process_windows.go b/process/process_windows.go
index 31bbdc73..2a59c3d1 100644
--- a/process/process_windows.go
+++ b/process/process_windows.go
@@ -2,28 +2,11 @@ package process
 
 import (
 	"fmt"
-	"strings"
 
 	"github.com/safing/portbase/log"
 	"github.com/safing/portbase/utils/osdetail"
 )
 
-// IsUser returns whether the process is run by a normal user.
-func (p *Process) IsUser() bool {
-	return p.Pid != 4 && // Kernel
-		!strings.HasPrefix(p.UserName, "NT") // NT-Authority (localized!)
-}
-
-// IsAdmin returns whether the process is run by an admin user.
-func (p *Process) IsAdmin() bool {
-	return strings.HasPrefix(p.UserName, "NT") // NT-Authority (localized!)
-}
-
-// IsSystem returns whether the process is run by the operating system.
-func (p *Process) IsSystem() bool {
-	return p.Pid == 4
-}
-
 // IsKernel returns whether the process is the Kernel.
 func (p *Process) IsKernel() bool {
 	return p.Pid == 4