I am having the same problem and I did I am using macOS Catalina 10.15.2 and BalenaEtcher version 1.5.71 The only difference between my problem and Manuel is that instead of clicking it and it reappearing the message goes away and it sends me back to the beginning. I did CMD + OPT + I and got
Mon Jan 20 2020 19:33:01 GMT-0500 (Eastern Standard Time) Select image ({“image”:{“name”:“retropie-4.5.1-rpi2_rpi3.img”,“size”:2580545536,“compressedSize”:766700626,“isSizeEstimated”:true,“hasMBR”:true,“partitions”:[{“offset”:4194304,“size”:251658240,“type”:14,“index”:1},{“offset”:255852544,“size”:2323644416,“type”:131,“index”:2}],“path”:"/Users/andy/Desktop/retropie-4.5.1-rpi2_rpi3.img.gz",“extension”:“gz”,“logo”:false,“blockMap”:false},“applicationSessionUuid”:“4e259946-4a55-441b-a901-6753e97e806d”,“flashingWorkflowUuid”:“e6119ca2-891a-4471-b34a-45c4d05d52f7”,“sample”:0.1})
/Applications/balenaEtcher.app/Contents/Resources/app/node_modules/raven-js/dist/raven.js:58 Mon Jan 20 2020 19:33:14 GMT-0500 (Eastern Standard Time) Flashing 0 devices, 0% at null MB/s (total null MB/s) eta in undefineds with 0 failed devices
/Applications/balenaEtcher.app/Contents/Resources/app/node_modules/raven-js/dist/raven.js:58 Mon Jan 20 2020 19:33:14 GMT-0500 (Eastern Standard Time) Flash ({“image”:"/Users/andy/Desktop/retropie-4.5.1-rpi2_rpi3.img.gz",“drives”:[{“size”:7985954816,“isVirtual”:false,“enumerator”:“DiskArbitration”,“logicalBlockSize”:512,“raw”:"/dev/rdisk2",“error”:null,“isReadOnly”:false,“displayName”:"/dev/disk2",“blockSize”:512,“isSCSI”:false,“isRemovable”:true,“device”:"/dev/disk2",“busVersion”:null,“isSystem”:false,“busType”:“Secure Digital”,“isCard”:true,“isUSB”:false,“devicePath”:“IODeviceTree:/PCI0@0/RP04@1C,3/SDXC@0,1”,“mountpoints”:,“description”:“Apple SDXC Reader Media”,“isUAS”:null}],“driveCount”:1,“uuid”:“a08e5372-41ac-4904-8707-fe91dbf95f69”,“status”:“started”,“flashInstanceUuid”:“a08e5372-41ac-4904-8707-fe91dbf95f69”,“unmountOnSuccess”:true,“validateWriteOnSuccess”:true,“trim”:false,“applicationSessionUuid”:“4e259946-4a55-441b-a901-6753e97e806d”,“flashingWorkflowUuid”:“e6119ca2-891a-4471-b34a-45c4d05d52f7”,“sample”:0.1})
/Applications/balenaEtcher.app/Contents/Resources/app/node_modules/raven-js/dist/raven.js:58 Elevating command: /Applications/balenaEtcher.app/Contents/Frameworks/balenaEtcher Helper (Renderer).app/Contents/MacOS/balenaEtcher Helper (Renderer) /Applications/balenaEtcher.app/Contents/Resources/app
/Applications/balenaEtcher.app/Contents/Resources/app/node_modules/raven-js/dist/raven.js:58 Mon Jan 20 2020 19:33:14 GMT-0500 (Eastern Standard Time) SafeWebview loaded ({“event”:{“fromCache”:false,“headers”:{“Accept”:“text/html,application/xhtml+xml,application/xml;q=0.9,image/webp,image/apng,/;q=0.8,application/signed-exchange;v=b3”,“Sec-Fetch-Mode”:“navigate”,“Sec-Fetch-Site”:“none”,“Sec-Fetch-User”:"?1",“Upgrade-Insecure-Requests”:“1”,“User-Agent”:“Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_2) AppleWebKit/537.36 (KHTML, like Gecko) balena-etcher/1.5.71 Chrome/76.0.3809.146 Electron/6.1.4 Safari/537.36”},“id”:216,“method”:“GET”,“referrer”:"",“resourceType”:“mainFrame”,“responseHeaders”:{“access-control-allow-origin”:["*"],“age”:[“163”],“cache-control”:[“max-age=600”],“cf-cache-status”:[“DYNAMIC”],“cf-ray”:[“55853211c823a3f7-PIT”],“content-encoding”:[“br”],“content-type”:[“text/html; charset=utf-8”],“date”:[“Tue, 21 Jan 2020 00:33:14 GMT”],“expect-ct”:[“max-age=604800, report-uri=“https://report-uri.cloudflare.com/cdn-cgi/beacon/expect-ct””],“expires”:[“Mon, 20 Jan 2020 14:58:11 GMT”],“last-modified”:[“Tue, 14 Jan 2020 19:08:43 GMT”],“server”:[“cloudflare”],“status”:[“200”],“vary”:[“Accept-Encoding”],“via”:[“1.1 varnish”],“x-cache”:[“HIT”],“x-cache-hits”:[“1”],“x-fastly-request-id”:[“b7805e883da6cb942cd089c7c81a679d88cbc671”],“x-github-request-id”:[“33B8:18F2:4BA5B0:660EC6:5E25BDAB”],“x-proxy-cache”:[“MISS”],“x-served-by”:[“cache-cmh21543-CMH”],“x-timer”:[“S1579566795.542520,VS0,VE0”]},“statusCode”:200,“statusLine”:“HTTP/1.1 200”,“timestamp”:1579566794631.0571,“url”:“https://assets.balena.io/etcher-featured/index.html?etcher-version=1.5.71&api-version=2&optOutAnalytics=false"},“applicationSessionUuid”:“4e259946-4a55-441b-a901-6753e97e806d”,“flashingWorkflowUuid”:“e6119ca2-891a-4471-b34a-45c4d05d52f7”,"sample”:0.1})
/Applications/balenaEtcher.app/Contents/Resources/app/node_modules/raven-js/dist/raven.js:58 Mon Jan 20 2020 19:33:14 GMT-0500 (Eastern Standard Time) Flashing 0 devices, 0% at null MB/s (total null MB/s) eta in undefineds with 0 failed devices
/Applications/balenaEtcher.app/Contents/Resources/app/node_modules/raven-js/dist/raven.js:58 Flash results {cancelled: true}
/Applications/balenaEtcher.app/Contents/Resources/app/node_modules/raven-js/dist/raven.js:58 Mon Jan 20 2020 19:33:33 GMT-0500 (Eastern Standard Time) Elevation cancelled ({“status”:“started”,“image”:"/Users/andy/Desktop/retropie-4.5.1-rpi2_rpi3.img.gz",“drives”:[{“size”:7985954816,“isVirtual”:false,“enumerator”:“DiskArbitration”,“logicalBlockSize”:512,“raw”:"/dev/rdisk2",“error”:null,“isReadOnly”:false,“displayName”:"/dev/disk2",“blockSize”:512,“isSCSI”:false,“isRemovable”:true,“device”:"/dev/disk2",“busVersion”:null,“isSystem”:false,“busType”:“Secure Digital”,“isCard”:true,“isUSB”:false,“devicePath”:“IODeviceTree:/PCI0@0/RP04@1C,3/SDXC@0,1”,“mountpoints”:,“description”:“Apple SDXC Reader Media”,“isUAS”:null}],“driveCount”:1,“uuid”:“a08e5372-41ac-4904-8707-fe91dbf95f69”,“flashInstanceUuid”:“a08e5372-41ac-4904-8707-fe91dbf95f69”,“unmountOnSuccess”:true,“validateWriteOnSuccess”:true,“trim”:false,“applicationSessionUuid”:“4e259946-4a55-441b-a901-6753e97e806d”,“flashingWorkflowUuid”:“e6119ca2-891a-4471-b34a-45c4d05d52f7”,“sample”:0.1})
/Applications/balenaEtcher.app/Contents/Resources/app/node_modules/raven-js/dist/raven.js:58 Terminating IPC server