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# Deprecated symbols

Review symbols that are no longer in active development, and their recommended replacements.

## Overview

Although these symbols are available for use, Apple is no longer actively developing them, and may remove them in a future release. Apple recommends moving away from these symbols and using their indicated replacements instead. Check the individual symbol pages for the recommended replacements.

## Topics

### Deprecated constants

[`static const NSBitmapFormat NSAlphaFirstBitmapFormat;`](/documentation/AppKit/NSAlphaFirstBitmapFormat)

A format where the alpha value comes first.

[`static const NSBitmapFormat NSAlphaNonpremultipliedBitmapFormat;`](/documentation/AppKit/NSAlphaNonpremultipliedBitmapFormat)

A format where alpha values are not premultiplied.

[`static const NSBitmapFormat NSFloatingPointSamplesBitmapFormat;`](/documentation/AppKit/NSFloatingPointSamplesBitmapFormat)

A format where samples are specified using floating-point numbers.

[`static const NSBitmapFormat NS16BitLittleEndianBitmapFormat;`](/documentation/AppKit/NS16BitLittleEndianBitmapFormat)

A 16-bit, little endian format.

[`static const NSBitmapFormat NS32BitLittleEndianBitmapFormat;`](/documentation/AppKit/NS32BitLittleEndianBitmapFormat)

A 32-bit, little endian format.

[`static const NSBitmapFormat NS16BitBigEndianBitmapFormat;`](/documentation/AppKit/NS16BitBigEndianBitmapFormat)

A 16-bit, big endian format.

[`static const NSBitmapFormat NS32BitBigEndianBitmapFormat;`](/documentation/AppKit/NS32BitBigEndianBitmapFormat)

A 32-bit, big endian format.


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