Hi Have a read of the Link below.. http://www.macyourself.com/2010/02/21/how-to-change-time-machine-backup-interval-backup-manually/ 21600 would change the backup time to every 6 hours.. Thank You Terry Genereaux terrygenereaux@xxxxxxxxxx MacBook Pro 2.2 Ghz ~ 4g Ram ~ 500g HD ~ SL 10.6.6 / Windows 7 Boot Camp On 2011-02-26, at 8:02 PM, Wayne Dobson wrote: >>> I tried it, but couldn't get it to work. Time Machine reverted to hourly >>> backups. I went back to Timemachine editor which works fine. >>> >>> Here, the file <com.apple.backupd-auto.plist> does not exist, but one could >>> easily be created with the content >>> >>> <key>StartInterval</key> >>> <integer>86400</integer> >>> >>> which should yield a 24 hour backup. Any one tried that? >>> > > Wayne Dobson > G4 eMac, 1.42 GHz > 2 GHz RAM,Leopard, > Mail, Safari > > > > > --- > Manage your account options at //www.freelists.org/list/muglo