Bước 1: Mở terminal gõ lệnh sau rồi Enter, nhập mật khẩu đăng nhập máy (lưu ý là lúc nhập mk ko hiện ** gì hết, cứ gõ đúng là được)
sudo nano /etc/hosts
Bước 2: 1 cửa sổ sẽ mở ra, dùng phím mũi tên để di duyển con trỏ xuống dưới cùng
Bước 4: Copy toàn bộ list hosts sau và nhấn Cmd + V để dán vào chỗ con trỏ ở bước 2
127.0.0.1 ic.adobe.io
127.0.0.1 52.6.155.20
127.0.0.1 52.10.49.85
127.0.0.1 23.22.30.141
127.0.0.1 34.215.42.13
127.0.0.1 52.84.156.37
127.0.0.1 65.8.207.109
127.0.0.1 3.220.11.113
127.0.0.1 3.221.72.231
127.0.0.1 3.216.32.253
127.0.0.1 3.208.248.199
127.0.0.1 3.219.243.226
127.0.0.1 13.227.103.57
127.0.0.1 34.192.151.90
127.0.0.1 34.237.241.83
127.0.0.1 44.240.189.42
127.0.0.1 52.20.222.155
127.0.0.1 52.208.86.132
127.0.0.1 54.208.86.132
127.0.0.1 63.140.38.120
127.0.0.1 63.140.38.160
127.0.0.1 63.140.38.169
127.0.0.1 63.140.38.219
127.0.0.1 wip.adobe.com
127.0.0.1 adobeereg.com
127.0.0.1 18.228.243.121
127.0.0.1 18.230.164.221
127.0.0.1 54.156.135.114
127.0.0.1 54.221.228.134
127.0.0.1 54.224.241.105
127.0.0.1 100.24.211.130
127.0.0.1 162.247.242.20
127.0.0.1 wip1.adobe.com
127.0.0.1 wip2.adobe.com
127.0.0.1 wip3.adobe.com
127.0.0.1 wip4.adobe.com
127.0.0.1 3dns.adobe.com
127.0.0.1 ereg.adobe.com
127.0.0.1 199.232.114.137
127.0.0.1 bam.nr-data.net
127.0.0.1 practivate.adobe
127.0.0.1 ood.opsource.net
127.0.0.1 crl.verisign.net
127.0.0.1 3dns-1.adobe.com
127.0.0.1 3dns-2.adobe.com
127.0.0.1 3dns-3.adobe.com
127.0.0.1 3dns-4.adobe.com
127.0.0.1 hl2rcv.adobe.com
127.0.0.1 genuine.adobe.com
127.0.0.1 www.adobeereg.com
127.0.0.1 www.wip.adobe.com
127.0.0.1 www.wip1.adobe.com
127.0.0.1 www.wip2.adobe.com
127.0.0.1 www.wip3.adobe.com
127.0.0.1 www.wip4.adobe.com
127.0.0.1 ereg.wip.adobe.com
127.0.0.1 ereg.wip.adobe.com
127.0.0.1 activate.adobe.com
127.0.0.1 adobe-dns.adobe.com
127.0.0.1 ereg.wip1.adobe.com
127.0.0.1 ereg.wip2.adobe.com
127.0.0.1 ereg.wip3.adobe.com
127.0.0.1 ereg.wip4.adobe.com
127.0.0.1 ereg.wip1.adobe.com
127.0.0.1 ereg.wip2.adobe.com
127.0.0.1 ereg.wip3.adobe.com
127.0.0.1 ereg.wip4.adobe.com
127.0.0.1 cc-api-data.adobe.io
127.0.0.1 practivate.adobe.ntp
127.0.0.1 practivate.adobe.ipp
127.0.0.1 practivate.adobe.com
127.0.0.1 adobe-dns-1.adobe.com
127.0.0.1 adobe-dns-2.adobe.com
127.0.0.1 adobe-dns-3.adobe.com
127.0.0.1 adobe-dns-4.adobe.com
127.0.0.1 lm.licenses.adobe.com
127.0.0.1 hlrcv.stage.adobe.com
127.0.0.1 prod.adobegenuine.com
127.0.0.1 practivate.adobe.newoa
127.0.0.1 activate.wip.adobe.com
127.0.0.1 activate-sea.adobe.com
127.0.0.1 uds.licenses.adobe.com
127.0.0.1 k.sni.global.fastly.net
127.0.0.1 activate-sjc0.adobe.com
127.0.0.1 activate.wip1.adobe.com
127.0.0.1 activate.wip2.adobe.com
127.0.0.1 activate.wip3.adobe.com
127.0.0.1 activate.wip4.adobe.com
127.0.0.1 na1r.services.adobe.com
127.0.0.1 lmlicenses.wip4.adobe.com
127.0.0.1 na2m-pr.licenses.adobe.com
127.0.0.1 wwis-dubc1-vip60.adobe.com
127.0.0.1 workflow-ui-prod.licensingstack.com
127.0.0.1 1b9khekel6.adobe.io
127.0.0.1 adobe-dns-01.adobe.com
127.0.0.1 adobe.demdex.net
127.0.0.1 adobe.tt.omtrdc.net
127.0.0.1 adobedc.demdex.net
127.0.0.1 adobeid-na1.services.adobe.com
127.0.0.1 assets.adobedtm.com
127.0.0.1 auth-cloudfront.prod.ims.adobejanus.com
127.0.0.1 auth.services.adobe.com
127.0.0.1 cai-splunk-proxy.adobe.io
127.0.0.1 cc-cdn.adobe.com
127.0.0.1 cc-cdn.adobe.com.edgekey.net
127.0.0.1 cclibraries-defaults-cdn.adobe.com
127.0.0.1 cclibraries-defaults-cdn.adobe.com.edgekey.net
127.0.0.1 cn-assets.adobedtm.com.edgekey.net
127.0.0.1 crlog-crcn.adobe.com
127.0.0.1 crs.cr.adobe.com
127.0.0.1 edgeproxy-irl1.cloud.adobe.io
127.0.0.1 ethos.ethos02-prod-irl1.ethos.adobe.net
127.0.0.1 geo2.adobe.com
127.0.0.1 lcs-cops.adobe.io
127.0.0.1 lcs-robs.adobe.io
127.0.0.1 pv2bqhsp36w.prod.cloud.adobe.io
127.0.0.1 services.prod.ims.adobejanus.com
127.0.0.1 ssl-delivery.adobe.com.edgekey.net
127.0.0.1 sstats.adobe.com
127.0.0.1 stls.adobe.com-cn.edgesuite.net
127.0.0.1 stls.adobe.com-cn.edgesuite.net.globalredir.akadns.net
127.0.0.1 use-stls.adobe.com.edgesuite.net
127.0.0.1 9ngulmtgqi.adobe.io
127.0.0.1 lcs-robs.adobe.io
127.0.0.1 9ngulmtgqi.adobe.io
127.0.0.1 vcorzsld2a.adobe.io
127.0.0.1 r5hacgq5w6.adobe.io
127.0.0.1 vajcbj9qgq.adobe.io
127.0.0.1 69tu0xswvq.adobe.io
127.0.0.1 dyzt55url8.adobe.io

Bước 5: Nhấn Control + O và Enter để save lại (Control chứ ko phải command, chữ O chứ không phải số 0 nha). Sau đó nhấn Control + X để thoát khỏi trình edit
Bước 6: Dán thêm lệnh sau vào Terminal rồi Enter
sudo killall -HUP mDNSResponder && sudo dscacheutil -flushcache
Như vậy là xong, mở Lightroom lại xem còn bị hiện thông báo kia không?
Muốn reset lại Hosts file, bạn có thể dùng Adobe Cleaner Tool chính chủ của Adobe. Mở lên chọn như hình
