[Camali]

I installed Mavericks WITHOUT a backup to my old system Mountain Lion (never had a problem before, but Mavericks proved different) I want to reinstall Mavericks and see if that helps with the issues that I am having, but I can't back up to Time Machine because it says I need 4.3TB of HD Space when my Boot drive is a 512SSD!!!
Without a backup for now, and I don't want to lose any of my data, whats the best way to REINSTALL Mavericks? I got two machines that are experiences issues.

[ibook_steve]

Just re-download and re-install from the App store.

Steve

[is not]

Which issues are you seeing?

[Camali]

on the MacPro Mail keeps removing an account even though I've added it in the "Internet Accounts" and Mail preferences.

on the Macbook Pro, most of the CC apps take forever to open a file, the apps stop "responding" but then eventually open the files.