Google Books has a lot of InfoWorld scanned, and those are posted, I don't know if they have
permission to post it, but they've done so. InfoWorld has been running since 1982 and is a great source of information not only for Macintosh stuff specifically, but it's also filled with various bits about other computers, high profile names on the tech scene, and that kind of thing.
InfoWorld has long been focused on business decision making, so there's not a whole lot about home computers, nor did like, Commodore do a whole lot of advertising in the publication, but it's interesting nevertheless. I personally love thumbing/scrolling through it because that's where my interests lie anyway, and because Apple is surprisingly active on their pages.
One interesting aspect of the Mac compared to almost every other vintage community scene is just like our software publisher situation, most or nearly all of the book and magazine publishers that produced for the Mac "back in the day" are still around, or their intellectual property is owned by a magazine that's still around. MacAddict got folded into Mac|Life, for example, MacWorld is still around, and along the way they actually picked up a few other publications, etc.
And, as always I do have to put up a fair warning that posting up a whole magazine in its entirety would be considered a "bad plan" from a copyright and intellectual property perspective. Even though most magazines are considered very timely media, they have essentially the copyright policies applied to them as, say, novels.
