## MacOS Tags

On MacOS systems, the there are additional MDItem and XAttr Finder tags that may be extracted. These tags are not extracted by default -- they must be specifically requested or enabled via an API option. (Except when reading MacOS "._" files directly, see below.)

The tables below list some of the tags that may be extracted, but ExifTool will extract all available information even for tags not listed.

Tags in these tables are referred to as "pseudo" tags because their information is not stored in the file itself. As such, Writable tags in these tables may be changed without having to rewrite the file.

Note that on some filesystems, MacOS creates sidecar files with names that begin with "._". ExifTool will read these files if specified, and extract the information listed in the following table without the need for extra options, but these files are not writable directly.

> Tag ID | Tag Name | Writable | Values / Notes
> --- | --- | --- | ---
> 0x0002 | RSRC | - | --> RSRC Tags
> 0x0009 | ATTR | - | --> MacOS XAttr Tags

## MacOS XAttr Tags

XAttr tags are extracted using the "xattr" utility. They are extracted if any "XAttr*" tag or the MacOS group is specifically requested, or by setting the XAttrTags API option to 1 or the RequestAll API option to 2 or higher. And they are extracted by default from MacOS "._" files when reading these files directly.

> Tag Name | Writable | Values / Notes
> --- | --- | ---
> XAttrAppleMailDateReceived | no |
> XAttrAppleMailDateSent | no |
> XAttrAppleMailIsRemoteAttachment | no |
> XAttrFinderInfo | no |
> XAttrLastUsedDate | no |
> XAttrMDItemDownloadedDate | no |
> XAttrMDItemFinderComment | no |
> XAttrMDItemWhereFroms | no |
> XAttrMDLabel | no |
> XAttrQuarantine | yes! | (quarantine information for files downloaded from the internet. May only be deleted when writing)
> XAttrResourceFork | no |

## MacOS MDItem Tags

MDItem tags are extracted using the "mdls" utility. They are extracted if any "MDItem*" tag or the MacOS group is specifically requested, or by setting the MDItemTags API option to 1 or the RequestAll API option to 2 or higher. Note that these tags do not necessarily reflect the current metadata of a file -- it may take some time for the MacOS mdworker daemon to index the file after a metadata change.

> Tag Name | Writable | Values / Notes
> --- | --- | ---
> AppleMailDateReceived | no |
> AppleMailDateSent | no |
> AppleMailFlagged | no |
> AppleMailIsRemoteAttachment | no |
> AppleMailMessageID | no |
> AppleMailPriority | no |
> AppleMailRead | no |
> AppleMailRepliedTo | no |
> MDItemAccountHandles | no |
> MDItemAccountIdentifier | no |
> MDItemAcquisitionMake | no |
> MDItemAcquisitionModel | no |
> MDItemAltitude | no |
> MDItemAperture | no |
> MDItemAudioBitRate | no |
> MDItemAudioChannelCount | no |
> MDItemAuthorEmailAddresses | no |
> MDItemAuthors | no |
> MDItemBitsPerSample | no |
> MDItemBundleIdentifier | no |
> MDItemCity | no |
> MDItemCodecs | no |
> MDItemColorSpace | no |
> MDItemComment | no |
> MDItemContentCreationDate | no |
> MDItemContentCreationDateRanking | no |
> MDItemContentCreationDate_Ranking | no |
> MDItemContentModificationDate | no |
> MDItemContentType | no |
> MDItemContentTypeTree | no |
> MDItemContributors | no |
> MDItemCopyright | no |
> MDItemCountry | no |
> MDItemCreator | no |
> MDItemDateAdded | no |
> MDItemDateAdded_Ranking | no |
> MDItemDescription | no |
> MDItemDisplayName | no |
> MDItemDownloadedDate | no |
> MDItemDurationSeconds | no |
> MDItemEXIFGPSVersion | no |
> MDItemEXIFVersion | no |
> MDItemEmailConversationID | no |
> MDItemEncodingApplications | no |
> MDItemExposureMode | no |
> MDItemExposureProgram | no |
> MDItemExposureTimeSeconds | no |
> MDItemFNumber | no |
> MDItemFSContentChangeDate | no |
> MDItemFSCreationDate | yes! | (file creation date. Requires "setfile" for writing. Note that when reading, it may take a few seconds after writing a file before this value reflects the change. However, FileCreateDate is updated immediately)
> MDItemFSCreatorCode | no |
> MDItemFSFinderFlags | no |
> MDItemFSHasCustomIcon | no |
> MDItemFSInvisible | no |
> MDItemFSIsExtensionHidden | no |
> MDItemFSIsStationery | no |
> MDItemFSLabel | yes! |
> 0 = 0 (none) 1 = 1 (Gray) 2 = 2 (Green) 3 = 3 (Purple) |  | 4 = 4 (Blue) 5 = 5 (Yellow) 6 = 6 (Red) 7 = 7 (Orange)
> MDItemFSName | no |
> MDItemFSNodeCount | no |
> MDItemFSOwnerGroupID | no |
> MDItemFSOwnerUserID | no |
> MDItemFSSize | no |
> MDItemFSTypeCode | no |
> MDItemFinderComment | yes! |
> MDItemFlashOnOff | no |
> MDItemFocalLength | no |
> MDItemGPSDateStamp | no |
> MDItemGPSStatus | no |
> MDItemGPSTrack | no |
> MDItemHasAlphaChannel | no |
> MDItemISOSpeed | no |
> MDItemIdentifier | no |
> MDItemImageDirection | no |
> MDItemInterestingDateRanking | no |
> MDItemInterestingDate_Ranking | no |
> MDItemIsApplicationManaged | no |
> MDItemIsExistingThread | no |
> MDItemIsLikelyJunk | no |
> MDItemKeywords | no |
> MDItemKind | no |
> MDItemLastUsedDate | no |
> MDItemLastUsedDate_Ranking | no |
> MDItemLatitude | no |
> MDItemLensModel | no |
> MDItemLogicalSize | no |
> MDItemLongitude | no |
> MDItemMailDateReceived_Ranking | no |
> MDItemMailboxes | no |
> MDItemMediaTypes | no |
> MDItemNumberOfPages | no |
> MDItemOrientation | no |
> MDItemOriginApplicationIdentifier | no |
> MDItemOriginMessageID | no |
> MDItemOriginSenderDisplayName | no |
> MDItemOriginSenderHandle | no |
> MDItemOriginSubject | no |
> MDItemPageHeight | no |
> MDItemPageWidth | no |
> MDItemPhysicalSize | no |
> MDItemPixelCount | no |
> MDItemPixelHeight | no |
> MDItemPixelWidth | no |
> MDItemPrimaryRecipientEmailAddresses | no |
> MDItemProfileName | no |
> MDItemRecipients | no |
> MDItemRedEyeOnOff | no |
> MDItemResolutionHeightDPI | no |
> MDItemResolutionWidthDPI | no |
> MDItemSecurityMethod | no |
> MDItemSpeed | no |
> MDItemStateOrProvince | no |
> MDItemStreamable | no |
> MDItemSubject | no |
> MDItemTimestamp | no |
> MDItemTitle | no |
> MDItemTotalBitRate | no |
> MDItemUseCount | no |
> MDItemUsedDates | no |
> MDItemUserDownloadedDate | no |
> MDItemUserDownloadedUserHandle | no |
> MDItemUserSharedReceivedDate | no |
> MDItemUserSharedReceivedRecipient | no |
> MDItemUserSharedReceivedRecipientHandle | no |
> MDItemUserSharedReceivedSender | no |
> MDItemUserSharedReceivedSenderHandle | no |
> MDItemUserSharedReceivedTransport | no |
> MDItemUserTags | yes!+ | (requires "tag" utility for writing -- install with "brew install tag". Note that user tags may not contain a comma, and that duplicate user tags will not be written)
> MDItemVersion | no |
> MDItemVideoBitRate | no |
> MDItemWhereFroms | no |
> MDItemWhiteBalance | no |

(This document generated automatically by Image::ExifTool::BuildTagLookup)
Last revised Apr 13, 2021

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