[grid] Detect Safari and SFT only when on macOS.

Helps with #12521

Author: diemol

java/src/org/openqa/selenium/safari/SafariDriverInfo.java

@@ -24,6 +24,7 @@
 import java.util.Optional;
 import org.openqa.selenium.Capabilities;
 import org.openqa.selenium.ImmutableCapabilities;
+import org.openqa.selenium.Platform;
 import org.openqa.selenium.SessionNotCreatedException;
 import org.openqa.selenium.WebDriver;
 import org.openqa.selenium.WebDriverException;
@@ -65,8 +66,12 @@ public boolean isSupportingBiDi() {
   @Override
   public boolean isAvailable() {
     try {
-      DriverFinder.getPath(SafariDriverService.createDefaultService(), getCanonicalCapabilities());
-      return true;
+      if (Platform.getCurrent().is(Platform.MAC)) {
+        DriverFinder.getPath(
+            SafariDriverService.createDefaultService(), getCanonicalCapabilities());
+        return true;
+      }
+      return false;
     } catch (IllegalStateException | WebDriverException e) {
       return false;
     }
@@ -75,9 +80,12 @@ public boolean isAvailable() {
   @Override
   public boolean isPresent() {
     try {
-      DriverFinder.getPath(
-          SafariDriverService.createDefaultService(), getCanonicalCapabilities(), true);
-      return true;
+      if (Platform.getCurrent().is(Platform.MAC)) {
+        DriverFinder.getPath(
+            SafariDriverService.createDefaultService(), getCanonicalCapabilities(), true);
+        return true;
+      }
+      return false;
     } catch (IllegalStateException | WebDriverException e) {
       return false;
     }

java/src/org/openqa/selenium/safari/SafariTechPreviewDriverInfo.java

@@ -24,6 +24,7 @@
 import java.util.Optional;
 import org.openqa.selenium.Capabilities;
 import org.openqa.selenium.ImmutableCapabilities;
+import org.openqa.selenium.Platform;
 import org.openqa.selenium.SessionNotCreatedException;
 import org.openqa.selenium.WebDriver;
 import org.openqa.selenium.WebDriverException;
@@ -66,9 +67,12 @@ public boolean isSupportingBiDi() {
   @Override
   public boolean isAvailable() {
     try {
-      DriverFinder.getPath(
-          SafariTechPreviewDriverService.createDefaultService(), getCanonicalCapabilities());
-      return true;
+      if (Platform.getCurrent().is(Platform.MAC)) {
+        DriverFinder.getPath(
+            SafariTechPreviewDriverService.createDefaultService(), getCanonicalCapabilities());
+        return true;
+      }
+      return false;
     } catch (IllegalStateException | WebDriverException e) {
       return false;
     }
@@ -77,9 +81,14 @@ public boolean isAvailable() {
   @Override
   public boolean isPresent() {
     try {
-      DriverFinder.getPath(
-          SafariTechPreviewDriverService.createDefaultService(), getCanonicalCapabilities(), true);
-      return true;
+      if (Platform.getCurrent().is(Platform.MAC)) {
+        DriverFinder.getPath(
+            SafariTechPreviewDriverService.createDefaultService(),
+            getCanonicalCapabilities(),
+            true);
+        return true;
+      }
+      return false;
     } catch (IllegalStateException | WebDriverException e) {
       return false;
     }