Differences between ABBYY FineReader Engine for Windows and Mac

Here you can find the list of differences between ABBYY FineReader Engine 12 for Windows and for Mac.

Differences

While the ABBYY FineReader Engine for Windows API conforms to the COM standard and can be used in any development tool supporting COM, the Mac version provides only C/C++ native API and an Objective-C wrapper, so your application needs to be written in C/C++ or Objective-C.
You need to work with string properties using FREngineAllocString and FREngineFreeString functions instead of SysAllocString or SysFreeString.
Distribution packages for Windows and Mac platforms are different. See details in ABBYY FineReader Engine Distribution Kit.
The IsSharedCPUCoresMode parameter of the InitializeEngine function and SetCurrentLicense method is ignored.
The IEngine::OpenImageFileFromMemory, IFRDocument::AddImageFileFromMemory methods receive two parameters instead of one HGLOBAL handle — a pointer to the memory block and an __int64 variable equal to image size.
Image documents and page layouts are always unloaded to disk and cannot be kept in memory only:

The methods working with memory image formats (Raw, Bitmap, DIB) are not implemented: IImage::EstimateBitmapSize, IImage::GetBitmap, IEngine::OpenBitmap, IEngine::OpenBitmapBits, IEngine::OpenDib IEngine::PrepareBitmap, IEngine::PrepareBitmapBits, IEngine::PrepareDib, ITrainingImage::SetBitmapBits.

The following functionality is not supported:

IEngine::ParentWindow, IEngine::ApplicationTitle
IEngineLoader, InprocLoader, OutprocLoader, IHostProcessControl
Parallel processing (IEngine::MultiProcessingParams, MultiProcessingParams, MultiProcessingModeEnum, IParallelProcessingCallback), FineReader Engine Processor module (FREngineModuleEnum::FREM_FREngineProcessor)
Batch Processor and related interfaces (BatchProcessor, IImageSource, IFileAdapter, IAsyncProcessingCallback)
WDP, WIC, DjVu input image formats (IFF_WdpBw, IFF_WdpGray, IFF_WdpColor, IFF_Wic, IFF_DjVuBw, IFF_DjVuGray, IFF_DjVuColor in the ImageFileFormatEnum enumeration)
Opening Office formats (OfficeConversionSettings, OfficeConverters, OfficeConvertersTypeEnum, IPrepareImageMode::OfficeConversionSettings, Opening Office Formats module)
Methods for saving into memory and loading from memory which use HGLOBAL in Windows version:

IEngine::CreateScanManager, ScanManager
IScanCallback
ScanSources, ScanSource, ScanSourceSettings, ScanSourceCapabilities
ScanSourceApiTypeEnum, ScanRotationAngleEnum, ScanPaperSizeEnum, ScanColorModeEnum, ScanCompressionTypeEnum, ScanBrightnessControlEnum, ScanPaperFeedModeEnum, ScanPauseModeEnum, ScanSourceStatusEnum
Scanning license module