Still an issue for me, but I at least found a way to surface the errors that are occurring when the download is interrupted, through the Console app. I wrote the paragraphs below after thinking that I was in the clear, since I could tell that the screen saver was actually downloading for once. But before submitting this post I found that it had stopped 😭, with the following console messages: default 11:32:52.936999-0700 WallpaperAgent Downloading (62%): AER-F390FE3B error 11:32:53.227474-0700 idleassetsd Task <AE6ADF4D-DFF3-4720-8C8E-9A58A6C57A9B>.<1> finished with error [-1001] Error Domain=NSURLErrorDomain Code=-1001 UserInfo={_kCFStreamErrorCodeKey=-2103, NSURLSessionDownloadTaskResumeData=<private>, _NSURLErrorFailingURLSessionTaskErrorKey=<private>, _NSURLErrorRelatedURLSessionTaskErrorKey=<private>, NSLocalizedDescription=<private>, NSErrorFailingURLStringKey=<private>, NSErrorFailingURLKey=<private>, _kCFStreamErrorDomainKey=4} default 11:32:53.227725-0700 idleassetsd nw_connection_report_state_with_handler_on_nw_queue [C2] reporting state cancelled default 11:32:53.228321-0700 idleassetsd <TVISHTTPRequester: 0x2364ff8c8> URL response etag ("F65A363ECFD3DE3D3B81EBBF06D87809-12") has been updated for url: (https://sylvan.apple.com/itunes-assets/Aerials116/v4/cb/5b/50/cb5b5035-6701-619f-9065-3d7d0e5fbef4/W014_C018_F01_FRC_sdr_4k_qp29_240p_t2160_grover401_tsa.mov) error 11:32:53.228380-0700 idleassetsd -[TVISAerialAssetService _downloadAssetWithID:remoteURL:parentProgress:completion:]_block_invoke - Error downloading asset with id: F390FE3B-FA61-483D-BADC-2447F89951BA, from URL: https://sylvan.apple.com/itunes-assets/Aerials116/v4/cb/5b/50/cb5b5035-6701-619f-9065-3d7d0e5fbef4/W014_C018_F01_FRC_sdr_4k_qp29_240p_t2160_grover401_tsa.mov, error: Error Domain=NSURLErrorDomain Code=-1001 "The request timed out." UserInfo={_kCFStreamErrorCodeKey=-2103, NSURLSessionDownloadTaskResumeData=<CFData 0x600001294510 [0x1de7079a0]>{length = 25658, capacity = 65536, bytes = 0x3c3f786d6c2076657273696f6e3d2231 ... 2f706c6973743e0a}, _NSURLErrorFailingURLSessionTaskErrorKey=LocalDownloadTask <AE6ADF4D-DFF3-4720-8C8E-9A58A6C57A9B>.<1>, _NSURLErrorRelatedURLSessionTaskErrorKey=( "LocalDownloadTask <AE6ADF4D-DFF3-4720-8C8E-9A58A6C57A9B>.<1>" ), NSLocalizedDescription=The request timed out., NSErrorFailingURLStringKey=https://sylvan.apple.com/itunes-assets/Aerials116/v4/cb/5b/50/cb5b5035-6701-619f-9065-3d7d0e5fbef4/W014_C018_F01_FRC_sdr_4k_qp29_240p_t2 default 11:32:53.228440-0700 idleassetsd [downloadTask: 1, assetID: F390FE3B-FA61-483D-BADC-2447F89951BA] End error 11:32:53.228547-0700 idleassetsd -[TVISScreenSaverService forceDownloadAssetsWithIDs:reply:]_block_invoke - force downloading assets error: Error Domain=TVISAssetServiceManagerErrorDomain Code=-8000 "(null)" UserInfo={FailedAssetIDs={( "F390FE3B-FA61-483D-BADC-2447F89951BA" )}} default 11:32:53.228918-0700 WallpaperAgent -[TVISScreenSaverServiceController forceDownloadAssetsWithIDs:completion:]_block_invoke - Force download completed. Error: Error Domain=TVISAssetServiceManagerErrorDomain Code=-8000 "(null)" UserInfo={FailedAssetIDs={( "F390FE3B-FA61-483D-BADC-2447F89951BA" )}} error 11:32:53.229147-0700 WallpaperAgent Error downloading representative asset 'F390FE3B-FA61-483D-BADC-2447F89951BA': TVISAssetServiceManagerErrorDomain (-8000) <private> default 11:32:53.229279-0700 idleassetsd -[TVISServiceConnection fetchScreenSaverConfigurationWithReply:] - received fetch request for active screensaver config default 11:32:53.230513-0700 WallpaperAgent Complete Download: AER-F390FE3B) . Everything below was written when I thought the problem had been solved by a restart or update: This issue had been dogging me for ages—specifically, whenever I'd attempt to download a second aerial screen saver, the progress wheel wouldn't progress at all. Even after waiting for several hours. I tried again today and found that it's actually progressing. I don't know if this is due to a system restart or a recent Sonoma update (I updated to 14.2.1 yesterday). FWIW, since the progress wheel is so tiny that it makes it very difficult to tell whether the download is progressing, I found that you can follow its percentage progress within the Console app: Open the Console app (e.g. press CMD + Space Bar to open the Spotlight search bar, and enter "Console") Within the Console app, find the search bar at the top right corner of the window. In the search bar, type process:WallpaperAgent to filter the log messages. This will limit messages to only those coming from the "WallpaperAgent" process. If messages aren't already streaming, click "Start streaming" in the main area of the console window. If an aerial screensaver is downloading, you should now see a progress message generate once per second (e.g. "Downloading (62%): AER-F390FE3B")