When comparing MacUpdate vs MacUpdater, the Slant community recommends MacUpdater for most people. In the question“What are the best software update clients for a Mac?” MacUpdater is ranked 1st while MacUpdate is ranked 3rd. The most important reason people chose MacUpdater is:
Does a scan, shows a list of apps (which can be filtered to exclude apps from the App Store, or only show apps with an update), then there's an update button for each app that has an update.
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Pros
Pro Less user intervention to install apps
Compared to now discontinued AppFresh, MacUpdate requires much less user intervention to install things. Most of the time it's a prompt for Admin password to install stuff.
Pro Extremely simple to use
Does a scan, shows a list of apps (which can be filtered to exclude apps from the App Store, or only show apps with an update), then there's an update button for each app that has an update.
Pro One-time payment
It's fairly cheap, and it's not subscription-based.
Pro Shows detailed information about an update
You can see release notes or changelogs (if available), and also the source of the information that is displayed. That is very helpful when considering whether to apply or ignore a specific update.
Pro Manageable
You can ignore entire apps, or just one specific update for an app, so you can clean out your to-do list of updates.
Pro Application updates can be done from within the app
There are several options for the individual apps, among which "Update app" is very pratical.
Pro Scheduled scans
You can set MacUpdater to scan for updates on a regular basis, e.g. weekly, so that you don't need to scan each app separately. The more apps you have, the more time (and attention) this will save you.
Cons
Con Expensive
Considering this is a 6 month subscription, 1 year's subscription adds up to $40.
Con Not as deep as Appfresh was
Appfresh when it was around, could scan browsers for extensions, plugins, etc. MacUpdate doesn't do this.