Mac software quick-fire questions

How to migrate Aperture images to Photos?

> Choose a copy of the library when opening Photos with å held. Or, try the same in iPhoto, which should convert it into a format Photos can open. Retroactive from bit.ly/mac352rtroct lets Aperture and iPhoto run in Catalina.

How to check integrity of files using checksums?

> Compute a ‘signature’ using Hash from the App Store. Most used are MD5, SHA1 and SHA256. Many sites offering downloads provide their values so you can check what appears on your Mac, and you can do the same for other docs.