diff --git a/frontend/src/Settings/ImportLists/ImportLists/EditImportListModalContent.js b/frontend/src/Settings/ImportLists/ImportLists/EditImportListModalContent.js
index d80427d48e..03756adec9 100644
--- a/frontend/src/Settings/ImportLists/ImportLists/EditImportListModalContent.js
+++ b/frontend/src/Settings/ImportLists/ImportLists/EditImportListModalContent.js
@@ -55,6 +55,7 @@ function EditImportListModalContent(props) {
     rootFolderPath,
     searchOnAdd,
     tags,
+    retroApplyTags,
     fields,
     message
   } = item;
@@ -225,6 +226,18 @@ function EditImportListModalContent(props) {
                 />
               </FormGroup>
 
+              <FormGroup>
+                <FormLabel>{translate('RadarrRetroactiveApply')}</FormLabel>
+
+                <FormInputGroup
+                  type={inputTypes.CHECK}
+                  name="retroApplyTags"
+                  helpText={translate('RetroApplyListTagsHelpText')}
+                  {...retroApplyTags}
+                  onChange={onInputChange}
+                />
+              </FormGroup>
+
               {
                 fields.map((field) => {
                   return (
diff --git a/frontend/src/Settings/ImportLists/ImportLists/Manage/ManageImportListsModalContent.tsx b/frontend/src/Settings/ImportLists/ImportLists/Manage/ManageImportListsModalContent.tsx
index 37e962a260..a854c31c40 100644
--- a/frontend/src/Settings/ImportLists/ImportLists/Manage/ManageImportListsModalContent.tsx
+++ b/frontend/src/Settings/ImportLists/ImportLists/Manage/ManageImportListsModalContent.tsx
@@ -82,6 +82,12 @@ const COLUMNS = [
     isSortable: true,
     isVisible: true,
   },
+  {
+    name: 'retroApplyTags',
+    label: () => translate('RetroApplyTags'),
+    isSortable: true,
+    isVisible: true,
+  },
 ];
 
 interface ManageImportListsModalContentProps {
diff --git a/frontend/src/Settings/ImportLists/ImportLists/Manage/ManageImportListsModalRow.tsx b/frontend/src/Settings/ImportLists/ImportLists/Manage/ManageImportListsModalRow.tsx
index 829ed94c49..92e6b2b013 100644
--- a/frontend/src/Settings/ImportLists/ImportLists/Manage/ManageImportListsModalRow.tsx
+++ b/frontend/src/Settings/ImportLists/ImportLists/Manage/ManageImportListsModalRow.tsx
@@ -19,6 +19,7 @@ interface ManageImportListsModalRowProps {
   minimumAvailability: string;
   implementation: string;
   tags: number[];
+  retroApplyTags: boolean;
   enabled: boolean;
   enableAuto: boolean;
   columns: Column[];
@@ -38,6 +39,7 @@ function ManageImportListsModalRow(props: ManageImportListsModalRowProps) {
     enabled,
     enableAuto,
     tags,
+    retroApplyTags,
     onSelectedChange,
   } = props;
 
@@ -91,6 +93,10 @@ function ManageImportListsModalRow(props: ManageImportListsModalRowProps) {
       <TableRowCell className={styles.tags}>
         <TagListConnector tags={tags} />
       </TableRowCell>
+
+      <TableRowCell className={styles.enabled}>
+        {retroApplyTags ? translate('Yes') : translate('No')}
+      </TableRowCell>
     </TableRow>
   );
 }
diff --git a/src/Directory.Build.props b/src/Directory.Build.props
index 174d1cb8a2..1e722177f0 100644
--- a/src/Directory.Build.props
+++ b/src/Directory.Build.props
@@ -221,7 +221,7 @@
   <PropertyGroup Condition="'$(IsOSX)' == 'true' and
                             '$(RuntimeIdentifier)' == ''">
     <_UsingDefaultRuntimeIdentifier>true</_UsingDefaultRuntimeIdentifier>
-    <RuntimeIdentifier>osx-x64</RuntimeIdentifier>
+    <RuntimeIdentifier>osx-$(Architecture)</RuntimeIdentifier>
   </PropertyGroup>
 
 </Project>
diff --git a/src/NzbDrone.Core/Datastore/Migration/241_add_retroapply_to_importlists.cs b/src/NzbDrone.Core/Datastore/Migration/241_add_retroapply_to_importlists.cs
new file mode 100644
index 0000000000..2b80ffd0ca
--- /dev/null
+++ b/src/NzbDrone.Core/Datastore/Migration/241_add_retroapply_to_importlists.cs
@@ -0,0 +1,13 @@
+using FluentMigrator;
+using NzbDrone.Core.Datastore.Migration.Framework;
+
+namespace NzbDrone.Core.Datastore.Migration;
+
+[Migration(241)]
+public class add_retroapply_to_importlists : NzbDroneMigrationBase
+{
+    protected override void MainDbUpgrade()
+    {
+        Alter.Table("ImportLists").AddColumn("RetroApplyTags").AsInt32().WithDefaultValue(0);
+    }
+}
diff --git a/src/NzbDrone.Core/ImportLists/ImportListSyncService.cs b/src/NzbDrone.Core/ImportLists/ImportListSyncService.cs
index 60c118a6a0..84c5da6b4c 100644
--- a/src/NzbDrone.Core/ImportLists/ImportListSyncService.cs
+++ b/src/NzbDrone.Core/ImportLists/ImportListSyncService.cs
@@ -81,9 +81,10 @@ private void ProcessMovieReport(ImportListDefinition importList, ImportListMovie
                 return;
             }
 
-            // Check to see if movie in DB
+            // Check to see if movie in DB and maybe apply retro-tags
             if (dbMovies.Contains(report.TmdbId))
             {
+                RetroApplyTags(importList, report);
                 _logger.Debug("{0} [{1}] Rejected, Movie Exists in DB", report.TmdbId, report.Title);
                 return;
             }
@@ -123,6 +124,26 @@ private void ProcessMovieReport(ImportListDefinition importList, ImportListMovie
             }
         }
 
+        private void RetroApplyTags(ImportListDefinition importList, ImportListMovie report)
+        {
+            if (importList.RetroApplyTags)
+            {
+                var movie = _movieService.FindByTmdbId(report.TmdbId);
+
+                var preCount = movie.Tags.Count;
+                foreach (var tag in importList.Tags)
+                {
+                    movie.Tags.Add(tag);
+                }
+
+                if (preCount != movie.Tags.Count)
+                {
+                    _movieService.UpdateMovie(movie);
+                    _logger.Debug("{0} [{1}] Retro-Actively added tags to movie", report.TmdbId, report.Title);
+                }
+            }
+        }
+
         private void ProcessListItems(ImportListFetchResult listFetchResult)
         {
             listFetchResult.Movies = listFetchResult.Movies.DistinctBy(x =>
diff --git a/src/NzbDrone.Core/Localization/Core/en.json b/src/NzbDrone.Core/Localization/Core/en.json
index 884c7394ce..f21cd84a69 100644
--- a/src/NzbDrone.Core/Localization/Core/en.json
+++ b/src/NzbDrone.Core/Localization/Core/en.json
@@ -841,6 +841,7 @@
   "ListSyncLevelHelpText": "Movies in library will be handled based on your selection if they fall off or do not appear on your list(s)",
   "ListSyncLevelHelpTextWarning": "Movie files will be permanently deleted, this can result in wiping your library if your lists are empty",
   "ListTagsHelpText": "Tags list items will be added with",
+  "RetroApplyListTagsHelpText": "Retro-Actively apply tags to movies already in Radarr",
   "ListWillRefreshEveryInterval": "List will refresh every {refreshInterval}",
   "Lists": "Lists",
   "Loading": "Loading",
@@ -1366,6 +1367,7 @@
   "Queued": "Queued",
   "QuickImport": "Move Automatically",
   "RadarrTags": "{appName} Tags",
+  "RadarrRetroactiveApply": "Retro-Apply Tags",
   "Rating": "Rating",
   "Ratings": "Ratings",
   "ReadTheWikiForMoreInformation": "Read the Wiki for more information",
diff --git a/src/NzbDrone.Core/ThingiProvider/ProviderDefinition.cs b/src/NzbDrone.Core/ThingiProvider/ProviderDefinition.cs
index a4c5db45b0..449af4c7ae 100644
--- a/src/NzbDrone.Core/ThingiProvider/ProviderDefinition.cs
+++ b/src/NzbDrone.Core/ThingiProvider/ProviderDefinition.cs
@@ -28,6 +28,7 @@ protected ProviderDefinition()
         public ProviderMessage Message { get; set; }
 
         public HashSet<int> Tags { get; set; }
+        public bool RetroApplyTags { get; set; }
 
         [MemberwiseEqualityIgnore]
         public IProviderConfig Settings
diff --git a/src/Radarr.Api.V3/ProviderResource.cs b/src/Radarr.Api.V3/ProviderResource.cs
index c5e8a1cd6f..4cecc4f0b4 100644
--- a/src/Radarr.Api.V3/ProviderResource.cs
+++ b/src/Radarr.Api.V3/ProviderResource.cs
@@ -16,6 +16,7 @@ public class ProviderResource<T> : RestResource
         public string InfoLink { get; set; }
         public ProviderMessage Message { get; set; }
         public HashSet<int> Tags { get; set; }
+        public bool RetroApplyTags { get; set; }
 
         public List<T> Presets { get; set; }
     }
@@ -36,6 +37,7 @@ public virtual TProviderResource ToResource(TProviderDefinition definition)
                 ConfigContract = definition.ConfigContract,
                 Message = definition.Message,
                 Tags = definition.Tags,
+                RetroApplyTags = definition.RetroApplyTags,
                 Fields = SchemaBuilder.ToSchema(definition.Settings),
 
                 // radarr/supported is an disambiguation page. the # should be a header on the page with appropriate details/link
@@ -60,7 +62,8 @@ public virtual TProviderDefinition ToModel(TProviderResource resource, TProvider
                 Implementation = resource.Implementation,
                 ConfigContract = resource.ConfigContract,
                 Message = resource.Message,
-                Tags = resource.Tags
+                Tags = resource.Tags,
+                RetroApplyTags = resource.RetroApplyTags,
             };
 
             var configContract = ReflectionExtensions.CoreAssembly.FindTypeByName(definition.ConfigContract);