version checks for features not present in 10.11

Ample/AppDelegate.m

@@ -96,10 +96,15 @@
         @"xfz",
         path
     ];
-    [task setExecutableURL: [NSURL fileURLWithPath: @"/usr/bin/tar"]];
+    if (@available(macOS 10.13, *)) {
+        [task setExecutableURL: [NSURL fileURLWithPath: @"/usr/bin/tar"]];
+        [task setCurrentDirectoryURL: sd];
+    } else {
+        [task setLaunchPath:  @"/usr/bin/tar"];
+        [task setCurrentDirectoryPath: SupportDirectoryPath()];
+    }
     [task setArguments: argv];
-    [task setCurrentDirectoryURL: sd];
+
-    
     
     dispatch_time_t when = dispatch_time(DISPATCH_TIME_NOW, (int64_t)(2 * NSEC_PER_SEC));
     [task setTerminationHandler: ^(NSTask *task){

Ample/AutocompleteControl.m

@@ -411,8 +411,11 @@ Todo --
 
 -(void)_init {
     _backgroundColor = [NSColor windowBackgroundColor];
-    _selectedColor = [NSColor selectedContentBackgroundColor];
+    if (@available(macOS 10.14, *)) {
-    
+        _selectedColor = [NSColor selectedContentBackgroundColor];
+    } else {
+        _selectedColor = [NSColor selectedTextBackgroundColor];
+    }
     NSTrackingAreaOptions options = NSTrackingMouseMoved | NSTrackingMouseEnteredAndExited | NSTrackingInVisibleRect | NSTrackingActiveInActiveApp;
     _trackingArea = [[NSTrackingArea alloc] initWithRect: NSZeroRect
                                                  options: options

Ample/Base.lproj/LaunchWindow.xib

@@ -1,7 +1,6 @@
 <?xml version="1.0" encoding="UTF-8"?>
 <document type="com.apple.InterfaceBuilder3.Cocoa.XIB" version="3.0" toolsVersion="15705" targetRuntime="MacOSX.Cocoa" propertyAccessControl="none" useAutolayout="YES" customObjectInstantitationMethod="direct">
     <dependencies>
-        <deployment identifier="macosx"/>
         <plugIn identifier="com.apple.InterfaceBuilder.CocoaPlugin" version="15705"/>
         <capability name="documents saved in the Xcode 8 format" minToolsVersion="8.0"/>
     </dependencies>

Ample/DiskImagesWindowController.m

@@ -67,8 +67,11 @@
     [window setRestorable: YES];
     [window setRestorationClass: [self class]];
 
-    
+    if (@available(macOS 10.13, *)) {
-    [_tableView registerForDraggedTypes: @[NSPasteboardTypeFileURL]];
+        [_tableView registerForDraggedTypes: @[NSPasteboardTypeFileURL]];
+    } else {
+        [_tableView registerForDraggedTypes: @[NSURLPboardType]];
+    }
     [_tableView setDraggingSourceOperationMask: NSDragOperationCopy forLocal: NO]; // enable drag/drop to othr apps.
 
     // Implement this method to handle any initialization after your window controller's window has been loaded from its nib file.
@@ -95,6 +98,11 @@
     [nc addObserver: self selector: @selector(willTerminate:) name: NSApplicationWillTerminateNotification object: nil];
 }
 
+-(void)timerCallback: (NSTimer *)timer {
+    _timer = nil;
+    [self saveFile];
+}
+
 -(void)diskImageAdded: (NSNotification *)notification {
     
     NSURL *url = [notification object];
@@ -105,11 +113,15 @@
 -(void)markDirty {
     _dirty = YES;
     if (_timer) [_timer invalidate];
+    _timer = [NSTimer scheduledTimerWithTimeInterval: 5 * 60 target: self selector: @selector(timerCallback:) userInfo: nil repeats: NO];
+#if 0
+    // 10.12+
     _timer = [NSTimer scheduledTimerWithTimeInterval: 5 * 60 repeats: NO block: ^(NSTimer *t) {
         
         self->_timer = nil;
         [self saveFile];
     }];
+#endif
 }
 
 -(void)saveFile {
@@ -306,11 +318,15 @@
     for (NSPasteboardItem *item in [pb pasteboardItems]) {
         
         // need to convert from a string to a url back to a file in case it's a file id url?
-        NSString *s = [item stringForType: NSPasteboardTypeFileURL];
+        NSString *s;
+        if (@available(macOS 10.13, *)) {
+            s = [item stringForType: NSPasteboardTypeFileURL];
+        } else {
+            s = [item stringForType: NSURLPboardType];
+        }
         if (!s) continue;
         NSURL *url = [NSURL URLWithString: s];
         if (!url) continue;
-        
         ok |= [self addFile: url];
     }
     return ok;

Ample/LogWindowController.m

@@ -53,9 +53,16 @@ static NSMutableSet *LogWindows;
     }
     
     NSTask *task = [NSTask new];
-    [task setExecutableURL: url];
+    
+    if (@available(macOS 10.13, *)) {
+        [task setExecutableURL: url];
+        [task setCurrentDirectoryURL: MameWorkingDirectory()];
+    } else {
+        [task setLaunchPath: MamePath()];
+        [task setCurrentDirectoryPath: MameWorkingDirectoryPath()];
+    }
+    
     [task setArguments: args];
-    [task setCurrentDirectoryURL: MameWorkingDirectory()];
     
     return [LogWindowController controllerForTask: task];
 }
@@ -84,20 +91,39 @@ static NSMutableSet *LogWindows;
     
     if (_task) return nil;
 
-    NSError *error = nil;
     NSPipe *pipe = [NSPipe pipe];
     
     // window not yet loaded until [self window] called.
-    const char *path = [[task executableURL] fileSystemRepresentation];
+
-//    if (cp) [self appendString: [NSString stringWithFormat: @"MAME path: %s", cp]];
+    const char *path = nil;
-    const char *wd = [[task currentDirectoryURL] fileSystemRepresentation];
+    const char *wd = nil;
-//    if (cp) [self appendString: [NSString stringWithFormat: @"Working Directory: %s", cp]];
+    
     
     [task setStandardError: pipe];
     [task setStandardOutput: pipe];
-    [task launchAndReturnError: &error];
+    if (@available(macOS 10.13, *)) {
-    
+        NSError *error = nil;
+        path = [[task executableURL] fileSystemRepresentation];
+        wd = [[task currentDirectoryURL] fileSystemRepresentation];
 
+        [task launchAndReturnError: &error];
+        if (error) {
+            NSLog(@"NSTask error. Path = %s error = %@", path, error);
+        }
+        return error;
+    } else {
+        path = [[task launchPath] fileSystemRepresentation];
+        wd = [[task currentDirectoryPath] fileSystemRepresentation];
+        @try {
+            [task launch];
+        } @catch (NSException *exception) {
+
+            NSLog(@"NSTask exception.  Path = %s exception = %@", path, exception);
+            return nil; // ?
+        }
+    }
+
+#if 0
     if (error) {
 //        NSURL *url = [task executableURL];
 //        NSString *path = [NSString stringWithCString: [url fileSystemRepresentation] encoding: NSUTF8StringEncoding];
@@ -106,6 +132,7 @@ static NSMutableSet *LogWindows;
 //        [self appendString: [error description]];
         return error;
     }
+#endif
     _task = task;
     NSString *title = [NSString stringWithFormat: @"Ample Log - %u", [task processIdentifier]];
     [[self window] setTitle: title];