I am trying to write a simple Cocoa / Objective-C app which allows the user to specify a Folder and a search term, and then searches in all files in the folder for the search term. Essentially, I am trying to make a GUI interface for the "grep" UNIX command and it's results. I am trying to use NSTask to create the shell command and return the results, but this is not working for whatever reason. I am able to get my search terms and directory strings just fine, but I get this message in my Run Log: Code: grep: /Users/oats/Desktop/wordpress_22/*: No such file or directory This is the NSTask setup: Code: NSTask *task; task = [[NSTask alloc] init]; [task setLaunchPath: @"/usr/bin/grep"]; NSArray *arguments; arguments = [NSArray arrayWithObjects: @"-l", @"-r", searchText, filepathstr, nil]; [task setArguments: arguments]; Then I launch the task and try to read the results: Code: NSPipe *pipe; pipe = [NSPipe pipe]; [task setStandardOutput: pipe]; NSFileHandle *file; file = [pipe fileHandleForReading]; [task launch]; NSData *data; data = [file readDataToEndOfFile]; This command works fine in the terminal, so why doesn't NSTask return anything? I've been a programmer for a long time (C++, Java), but Objective-C and Cocoa are rather new to me. Thanks!