To import a file from Photoshop, first export it as a TIFF file.
Follow these steps in Photoshop:1. Choose File > Save As.
2. Choose TIFF from the Format pop-up menu.
3. If you want to preserve layers, leave the Layers checkbox selected. Otherwise, click the checkbox to deselect this option.
4. Click Save
5. In the TIFF options panel, select appropriate compression and byte order (Macintosh).
6. Click the checkbox to select the "Save Transparency" option.
7. Select the appropriate Layer Compression.
8. Click OK.
Follow these steps in Keynote:1. Choose Edit > Place > Choose.
2. Select the TIFF file, and click Place.