My mac book air can't type numbers like "123",it appears "!@#". please tell me how to change it

Best MXF to QuickTime MOV Converter on Mac OS X <br /><br />MXF is a "container" or "wrapper" format which supports a number of different streams of coded "essence", encoded with any of a variety of codecs, together with a metadata wrapper which describes the material contained within the MXF file. MXF has been designed to address a number of problems with non-professional formats. MXF file format is not compatible with many programs. So you may have problem to play, edit or use these format. So are Panasonic HVX200/HPX300 MXF files, P2 MXF files. <br /><br />Apple QuickTime movie is stored in the format of Apple QuickTime (.mov, .qt) which is a file format for storing and playing back movies with sound. Though developed and supported primarily by Apple Computer, the format of Apple QuickTime isn't limited to Macintosh operating systems. Apple QuickTime is also commonly used in Windows systems, and other types of computing platforms. In Windows, QuickTime movies usually appear with the .mov filename extension. <br /><img src="mxf-mov1.jpg" /> <br />With Aunsoft <b><a href="http://dts-ac3-converter.com/2011/07/mac-mxf-to-mov-converter-convert-mxf-file-to-quicktime-mov-on-mac-os-x/">Mac MXF Conversion</a></b>, we can convert mxf file to QuickTime MOV on Mac with best quality, fastest converting speed, excellent A/V sync and so on. And we also can use the Mac MXF File Converter to convert mxf file to friendly video formats just like mpg, wmv, mp4, mov, mpeg, dv, etc for playing on iPad, iPod, iPhone 4, iTunes, PSP, Apple TV, Android Phones, etc so that we can watch our favorite mxf conversion file everywhere. <br /><br />Follow the step to <b><a href="http://www.aunsoft.com/video-converter-mac/">convert MXF files to QuickTime MOV</a></b> on Mac now. <br /><br />Step1: Download and install the <b><a href="http://download.aunsoft.com/video_converter_mac/videoconvertermac_setup.zip">best Mac MXF File Converter</a></b>, add your MXF file by clicking "Add" in the File menu or in the main interface. <br /><br />Step2: In "Format" drop down list box, you may select output format. The software allows setting different output formats according to different files. For example, I just set the QuickTime MOV as output format of the MXF file. <br /><img src="convert-mxf-to-quicktime-mov.jpg" /> <br />Step3: Now let's select the output folder by clicking the "Output folder" icon. <br /><br />Step4: Finally, click "Convert" in the main interface. After a successful conversion, click "Open" to check the QuickTime MOV files. <br /><br />If you're interested in converting MXF files to QuickTime MOV on Mac without losing quality, please visit: <b><a href="http://www.aunsoft.com/mac_mxf_to_quick_time_mov_converter_convert_mxf_files_to_mov/">Best Mac MXF to QuickTime MOV Converter</a> ; <a href="http://www.aunsoft.com/convert_p2_mxf_to_quicktime_mov_for_fcp_on_mac/">Convert P2 MXF to QuickTime MOV for FCP</a> ; <a href="http://www.aunsoft.com/edit_mxf_in_avid_media_composer_convert_p2_mxf_to_wmv_for_avid/">Convert P2 MXF to WMV for Avid</a> ; <a href="http://www.aunsoft.com/edit_mxf_files_in_adobe_after_effects/">Edit MXF Files in Adobe After Effects</a></b> .