Index: src/OFSystemInfo.h
==================================================================
--- src/OFSystemInfo.h
+++ src/OFSystemInfo.h
@@ -116,32 +116,52 @@
 
 #ifdef OF_HAVE_FILES
 /**
  * @brief Returns the path where user data for the application can be stored.
  *
- * On Unix systems, this adheres to the XDG Base Directory specification.@n
- * On Mac OS X and iOS, it uses the `NSApplicationSupportDirectory` directory.@n
+ * On UNIX systems, this adheres to the XDG Base Directory specification.@n
+ * On macOS and iOS, it uses the `NSApplicationSupportDirectory` directory.@n
  * On Windows, it uses the `APPDATA` environment variable.@n
- * On Haiku, it uses the `B_USER_SETTINGS_DIRECTORY` directory.
+ * On Haiku, it uses the `B_USER_SETTINGS_DIRECTORY` directory.@n
+ * On AmigaOS and MorphOS, it returns `PROGDIR:`.
  *
  * @return The path where user data for the application can be stored
  */
 + (nullable OFString *)userDataPath;
 
 /**
  * @brief Returns the path where user configuration for the application can be
  *	  stored.
  *
- * On Unix systems, this adheres to the XDG Base Directory specification.@n
- * On Mac OS X and iOS, it uses the `Preferences` directory inside of
+ * On UNIX systems, this adheres to the XDG Base Directory specification.@n
+ * On macOS and iOS, it uses the `Preferences` directory inside of
  * `NSLibraryDirectory` directory.@n
  * On Windows, it uses the `APPDATA` environment variable.@n
  * On Haiku, it uses the `B_USER_SETTINGS_DIRECTORY` directory.
+ * On AmigaOS and MorphOS, it returns `PROGDIR:`.
  *
  * @return The path where user configuration for the application can be stored
  */
 + (nullable OFString *)userConfigPath;
+
+/**
+ * @brief Returns a path where temporary files for can be stored.
+ * 
+ * If possible, returns a temporary directory for the user, otherwise returns a
+ * global temporary directory.
+ *
+ * On UNIX systems, this adheres to the XDG Base Directory specification and
+ * returns `/tmp` if `XDG_RUNTIME_DIR` is not set.@n
+ * On macOS and iOS, this uses `_CS_DARWIN_USER_TEMP_DIR`, falling back to
+ * `/tmp` if this fails.@n
+ * On Windows, it uses `GetTempPath`.@n
+ * On Haiku, it uses the `B_SYSTEM_TEMP_DIRECTORY` directory.
+ * On AmigaOS and MorphOS, it returns `T:`.
+ *
+ * @return A path where temporary files can be stored
+ */
++ (nullable OFString *)temporaryDirectoryPath;
 #endif
 
 /**
  * @brief Returns the vendor of the CPU.
  *

Index: src/OFSystemInfo.m
==================================================================
--- src/OFSystemInfo.m
+++ src/OFSystemInfo.m
@@ -522,10 +522,61 @@
 								 object: self];
 
 	return [var stringByAppendingPathComponent: @".config"];
 # endif
 }
+
++ (OFString *)temporaryDirectoryPath
+{
+# if defined(OF_MACOS) || defined(OF_IOS)
+	char buffer[PATH_MAX];
+	size_t length;
+
+	if ((length = confstr(_CS_DARWIN_USER_TEMP_DIR, buffer, PATH_MAX)) == 0)
+		return @"/tmp";
+
+	return [OFString stringWithCString: buffer
+				  encoding: [OFLocale encoding]
+				    length: length];
+# elif defined(OF_WINDOWS)
+	if ([self isWindowsNT]) {
+		wchar_t buffer[PATH_MAX];
+
+		if (!GetTempPathW(PATH_MAX, buffer))
+			return nil;
+
+		return [OFString stringWithUTF16String: buffer];
+	} else {
+		char buffer[PATH_MAX];
+
+		if (!GetTempPathA(PATH_MAX, buffer))
+			return nil;
+
+		return [OFString stringWithCString: buffer
+					  encoding: [OFLocale encoding]];
+	}
+# elif defined(OF_HAIKU)
+	char pathC[PATH_MAX];
+
+	if (find_directory(B_SYSTEM_TEMP_DIRECTORY, 0, false,
+	    pathC, PATH_MAX) != B_OK)
+		@throw [OFNotImplementedException exceptionWithSelector: _cmd
+								 object: self];
+
+	return [OFString stringWithUTF8String: pathC];
+# elif defined(OF_AMIGAOS)
+	return @"T:";
+# else
+	OFString *path =
+	    [[OFApplication environment] objectForKey: @"XDG_RUNTIME_DIR"];
+
+	if (path != nil)
+		return path;
+
+	return @"/tmp";
+# endif
+}
 #endif
 
 + (OFString *)CPUVendor
 {
 #if (defined(OF_X86_64) || defined(OF_X86)) && defined(__GNUC__)