Since Lightroom 6 is no longer for sale or supported, consider these legitimate paths: End of Support | Lightroom 6 Downloads and Syncing
Downloading "pre-activated" or cracked software from third-party sites is highly discouraged by cybersecurity experts for several reasons: Adobe Photoshop Lightroom 6.1 (x64) Activated Free Download
Cracked files are frequently bundled with hidden malware , such as ransomware, spyware, or keyloggers, which can steal personal data or banking credentials. Since Lightroom 6 is no longer for sale