Yes, it is possible to use a scanner with programs other than Windows. There are several ways to do this depending on the software and type of scanner you have.
If your scanner is an all-in-one, such as an HP printer/scanner combo, then you may be able to use the included software to scan images into a file format such as JPEG, TIFF, or PDF. You can then transfer these images to another application, such as Adobe Photoshop, for editing.
If you have a standalone scanner, such as an Epson or Canon model, then you will need to install the appropriate driver for your scanner that is compatible with the operating system you are using. For example, if you are using Mac OS X, then you will need to download and install the correct driver for your model of scanner. Once the driver is installed, most scanners will work with many different types of software applications, including Adobe Photoshop, Corel PaintShop Pro, or GIMP.
Another option is to use a third-party scanning software program. Several popular programs are available for both Windows and Mac, such as VueScan or Silverfast. These programs provide more features than the included software and often include support for a wider variety of scanners. They can also save images in multiple formats and can even perform advanced image correction.
No matter which software you choose, you should always follow the instructions provided by the manufacturer to ensure that your scanner is used properly and safely.