White or Black Box Around Cursor
SketchUp supports real-time 3D drawing, you must make sure your display settings are optimized for 3D. If you see a white or black outline around your cursor in SketchUp, you can usually fix this by increasing the color quality for your display.
Note: For some older graphics cards, this might not work. In that case, you should try updating your graphics driver. For more information about how to update a graphics driver, click here .
PC
Open the Start menu.
Click Control Panel.
Click Appearance and Themes.
Under Pick a task , click Change the screen resolution .
The Display Properties dialog box opens with the Settings tab selected.
In the Color quality box, select Highest (32 bit) .
Click OK .
Restart SketchUp.
Mac
Open System Preferences .
In the Hardware section, click Displays .
In the Color box, select Millions .
Restart SketchUp.