Question

We are working on Objective C application for desktop Mac.

We use WebView component to display HTML pages.

When the page is loaded from the local file system, Flash movies are not displayed on the page.
As it turned out the problem is not exactly about Flash.
Most WebView plugins are missing.

When the page is loaded from the Internet, Flash is displayed properly and there are many plugins available.

The problem does not occur on my Mac, but it happens to 30% of our customers.
It is reproduced on MacBook (not MacBook air), Mac OS version is 10.5.8.

Guys, please help us, I have no idea how to tackle this.
This is the only obstacle preventing us from the product release.

Why WebView plugins are not available when a local page is loaded?

What can be the source of the problem – Safari configuration, Mac security settings, some software installed?

How can I reproduce the problem on my Mac?

This is our WebView initialization code for local page loading.

IBOutlet WebView* webView;
...

[[webView preferences] setPlugInsEnabled:YES];    
WebFrame *mainFrame = [webView mainFrame];

NSString* path = [NSString stringWithFormat:@"%@/page.html",[[NSBundle mainBundle] resourcePath]];
NSURL* url = [NSURL fileURLWithPath:path];  

NSURLRequest *request = [NSURLRequest requestWithURL:url];
   [mainFrame loadRequest:request];

Have you noticed any flaws?

UPDATE 1

Test application

Source code

UPDATE 2

Minimal test, I have left only the code necessary to open the local page.
No diagnostic window displayed.
Test application, simple

Full source code for Application Delegate of the simple test

#import "WebViewAppDelegate.h"

#import <WebKit/WebView.h>
#import <WebKit/WebFrame.h>

@implementation WebViewAppDelegate
- (void)applicationDidFinishLaunching:(NSNotification *)aNotification {
    [[webView preferences] setPlugInsEnabled:YES];

    WebFrame *mainFrame = [webView mainFrame];
    NSString* path = [NSString stringWithFormat:@"%@/page.html",[[NSBundle mainBundle] resourcePath]];
    NSURL* url = [NSURL fileURLWithPath:path];  

    NSURLRequest *request = [NSURLRequest requestWithURL:url];
    [mainFrame loadRequest:request];

}

@end

Answer 1

ok,

running v2 from the download failed, I still got the plugins alert and no crab

so I rebuilt the xcode project and included 10.5 as a target, then manually moved the html and swf into contents and it reports all the safari plugins and runs on 10.5.8

so although your plist says 10.5 [min] your sdk target was/is 10.6, so it won’t run on 10.5

john