It is a fact that there are thousands of options available in the market to download the applications, which run on both the operating systems, such as Macintosh and Windows. But there are several big issues that one should consider before downloading any application. The first thing that you have to consider is whether it is available in the free or paid version. If it is not available in the free version, you can choose to download it and get the software at no cost. However, it would be a bad idea to download any app or application from unknown websites. As they might have some virus, which will destroy your computer or programs. You must make sure whether the software that you downloaded is compatible with your Windows or Macintosh OS. There are certain things that are required for doing so. Firstly, you have to check the compatibility of the software to the Windows and the Macintosh OS. As one of the major functions of Picasa is making the pictures accessible on the web, you must make sure that it runs perfectly. Secondly, you must ensure that the software that you download is available for download on the official website of Picasa. The official site, which is free, would contain all the links to the different versions of the software, which is offered by different developers. Applications like Picasa, which come under Apple Inc., provide the users with free software. They can download this application and store their pictures on their computer. This is very helpful for those who are traveling and want to take the pictures. The Picasa software can be downloaded through the internet. There are several websites which provide the software free of cost, and provide all the features of the application. The second option is to purchase the software from the official website of Picasa. The features that are provided by the application are unlimited storage space, free video streams, photo sharing, browsing in the web, and so on.