Failed to update; doesn't meet minimum BridgeOS requirement. Same issues for 1.15.5, .6, .7 and now Big Sur updates -_- Nov 13 18:58:08 Leos-MacBook-Pro-3 osinstallersetupd[5596]: OSISDownloadOperation: Using catalog for bridgeOS: https://swscan.apple.com/content/catalogs/others/index-10.15seed10.15-10.14-10.13-10.12-10.11-10.10-10.9-mountainlion-lion-snowleopard-leopard.merged-1.sucatalog Nov 13 18:58:08 Leos-MacBook-Pro-3 osinstallersetupd[5596]: OSISDownloadOperation: bridgeOS update is required (minimum bridge version: 18.16.12561.0.0,0) Nov 13 18:58:09 Leos-MacBook-Pro-3 osinstallersetupd[5596]: Operation queue failed with error: Error Domain=com.apple.OSInstallerSetup.error Code=551 "An error occurred installing macOS." UserInfo={NSUnderlyingError=0x7f8261d8d0d0 {Error Domain=BOSErrorDomain Code=300 "An error occurred loading the software update catalog." UserInfo={NSLocalizedDescription=An error occurred loading the software update catalog., NSUnderlyingError=0x7f8261dbcca0 {Error Domain=MSUProductManagerErrorDomain Code=50 "(null)" UserInfo={NSUnderlyingError=0x7f8268551b80 {Error Domain=MSUDataDownloaderErrorDomain Code=1 "(null)" UserInfo=0x7f8261e1e610 (not displayed)}}}}}, CatalogURL=https://swscan.apple.com/content/catalogs/others/index-10.15seed10.15-10.14-10.13-10.12-10.11-10.10-10.9-mountainlion-lion-snowleopard-leopard.merged-1.sucatalog, NSLocalizedRecoverySuggestion=You can try again to complete the installation., NSLocalizedDescription=An error occurred installing macOS.} Nov 13 18:58:09 Leos-MacBook-Pro-3 InstallAssistant[5594]: Stopped operation queue with Error Domain=com.apple.OSInstallerSetup.error Code=551 "An error occurred installing macOS." UserInfo={NSLocalizedDescription=An error occurred installing macOS., CatalogURL=https://swscan.apple.com/content/catalogs/others/index-10.15seed10.15-10.14-10.13-10.12-10.11-10.10-10.9-mountainlion-lion-snowleopard-leopard.merged-1.sucatalog, NSLocalizedRecoverySuggestion=You can try again to complete the installation., NSUnderlyingError=0x7fbd1f055bf0 {Error Domain=BOSErrorDomain Code=300 "An error occurred loading the software update catalog." UserInfo={NSLocalizedDescription=An error occurred loading the software update catalog., NSUnderlyingError=0x7fbd1f06bf80 {Error Domain=MSUProductManagerErrorDomain Code=50 "(null)" UserInfo={NSUnderlyingError=0x7fbd1f048f40 {Error Domain=MSUDataDownloaderErrorDomain Code=1 "(null)" UserInfo=0x7fbd191bad20 (not displayed)}}}}}}