As to whether it can be played successfully or not, it relies on the HEVC player to the end. Upgrading macOS and enhacing the hardware only ensure that your Mac computer owns the ability to play HEVC video. And old hardware can also result in HEVC video playback failure with lags and stuttering, as well as getting Mac computer overheated with exhausted CPU usage. From an operating system perspective, HEVC codec is only compatible on macOS Higher Sierra or later. The fact is that HEVC/H.265 file is absolutely not supported on Photos app and QuickTime Player, and you cannot play 4K H.265 on VLC without an installation of x265 codec. Why HEVC video won't play on MacBook Pro/Air, iMac etc? The fundamental reason comes that HEVC is not supported widely. HEVC files not playing QuickTime, Photos, VLC in macOS For example, Handbrake encoded HEVC MP4 videos can't be played on macOS High Sierra or later in QuickTime, HEVC is choppy or plays sound but not picture, VLC freezes when playing HEVC files or pops up a "No suitable decoder module" error, or they simply get an error message "Photos cannot play this video because it uses an unsupported format" etc. However, many users just realized that they can't play HEVC videos on Mac via Photos, VLC, and QuickTime. Many guys have access and apply this codec for better video quality and smaller size.
H.265/HEVC is a great successor to H.264/MPEG-4 AVC.
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